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Mineral Talks Live (7 June 2023; Gabriela Farfan - Curator of Gems and Minerals at the Smithsonian

AS
Alex Speer
Wed, May 31, 2023 5:12 PM

[A picture containing text, font, design  Description automatically generated]June 7 Webinar

Do you want a more personal, in-depth connection with some of the most fascinating people in the mineral world? Then tune in to Mineral Talks LIVE - the monthly LIVE interview series where we sit down with guests from all over the world and talk rocks. Collectors, Curators, Curatrixes, Artists, Researchers, Publishers, Dealers and more.  We get into their origin stories and get updated on some of the things they're working on now. It's always fun, often educational and one of the best ways to learn more about the people who make the mineral world what it is.

Tune in and listen to our LIVE talks and get a chance to ask our guests your own questions. You are invited to the next Zoom webinar:

Topic: Mineral Talks LIVE

7 Juney 2023 1:00 PM Eastern Time (US and Canada)

Register in advance for this webinar:  http://go.mineraltalksl ive.com/registerhttp://go.mineraltalksl%20ive.com/register

After registering, you will receive a confirmation email containing information about joining the webinar.

Speaker - Gabriela Farfan

[A person holding a rock  Description automatically generated with low confidence]

Dr. Gabriela Farfan is the Coralyn Whitney Curator of Gems and Minerals at the Smithsonian National Museum of Natural History.https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=298ce32967&e=7aa497567c She began collecting minerals and gems at age six and turned her hobby into a career as a mineralogist, geochemist, and the first woman and Latina to become a Curator-in-Charge of the National Gem & Mineral Collection.

She received her bachelors degree in Geological and Environmental Sciences from Stanford Universityhttps://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=0f2aa91be0&e=7aa497567c and her Ph.D. in Geochemistry from the MIT-WHOI Joint Programhttps://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=c31fb14bb4&e=7aa497567c.  Her research focuses on the crystal structures and chemistry of minerals formed under varying conditions in order to answer questions in environmental mineralogy, biomineralization, and gem science.  She primarily studies how biomineralizing organisms, such as corals and mollusks, make minerals and how these minerals record shifting aquatic environments in their crystallography and chemistry.  Dr. Farfan is a proud longtime member of the Mineralogical Society of Americahttps://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=3714843f15&e=7aa497567c, is currently on the board of the Society for Mineral Museum Professionals (SMMPhttps://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=f35f82293e&e=7aa497567c), and is looking forward to a long career in mineral and gem curation and mineral research at the Smithsonian.

[A picture containing accessory, fashion accessory, jewellery, crown jewels  Description automatically generated]

The Inquisition Necklace - Fifteeen Colombian emeralds and 336 diamonds make up this necklace. The 45 ct emerald in the center represents the very best color and quality of emerald from Colombia. Smithsonian National Museum of Natural History. Photograph by Raquel Alonso-Perez .


If you have missed a previous episode, they are posted 30 days after the event. Posted so far are:

Episode 01https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=4cc7401601&e=7aa497567c - Eloïse Gaillou; Episode 02https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=be25ad613c&e=7aa497567c - Robert Lavinsky; Episode 03https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=2809308e14&e=7aa497567c - Peter Megaw; Episode 04https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=544e20e22e&e=7aa497567c - Thomas Bellicam; Episode 05https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=7ef1078e56&e=7aa497567c - Raquel Alonso-Perez; Episode 06https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=9311c5379e&e=7aa497567c - Diana and Ian Bruce; Episode 07https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=1b97262aa9&e=7aa497567c - Patrick Dreher; Episode 08https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=c57a9e458a&e=7aa497567c -  John Rakovan; Episode 09https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=7bbb90b2a1&e=7aa497567c - Vera Hammer; Episode 10https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=c325b748e3&e=7aa497567c - Ryan Roney; Episode 11https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=9050fb07b3&e=7aa497567c - Bill Larson; Episode 12https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=f99a57ff27&e=7aa497567c - Joylan Ralph; Episode 13https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=ffe1dbe7f6&e=7aa497567c - Salim Eddé;  Episode 14https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=14b97e2c84&e=7aa497567c - George Rossman;  Episode 15https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=7088026b84&e=7aa497567c - The Collector's Edge; Episode 16https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=f5a3ab0c28&e=7aa497567c - Daniel Trinchillo; Episode 17https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=459bbbae94&e=7aa497567c - Jack Halpern; Episode 18https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=0619467145&e=7aa497567c- Stefan Nicolescu; Episode 19https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=6b5eca2a84&e=7aa497567c - Sami Makki, Matrix India;  Episode 20https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=a2dcefed4f&e=7aa497567c - Terry Wallace; Episode 21https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=9eee590c0c&e=7aa497567c - Tama Higuchi; Episode 22https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=8cf309b791&e=7aa497567c - Katherine Dunnell; Episode 23https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=0ecabf7b98&e=7aa497567c - Emanuele Marini; Episode 24https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=1099b7e01f&e=7aa497567c - Gail and Jim Spann; Episode 25https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=06cb4fd2ad&e=7aa497567c - Gloria Staebler; Episode 26https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=a7c6825665&e=7aa497567c- Frank Keutsch; Episode 27https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=3bac62fca5&e=7aa497567c- Tom and Christi, The Min Record; Episode 28https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=e6d2126673&e=7aa497567c - Fabian Wildfang; Episode 29https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=26ee8607fb&e=7aa497567c - Jordi Fabre; Episode 30https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=7eb4f8f550&e=7aa497567c - Bryan Swoboda; Episode 31https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=26f24eeb24&e=7aa497567c - Gene Meieran; Episode 32https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=ce3871614b&e=7aa497567c - Jeff Scovil; Episode 33https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=4c7a0bf389&e=7aa497567c- Federico Pezzotta; Episode 34https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=6bad036c9e&e=7aa497567c- Paula Crevoshay; Episode 35https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=a25c39747d&e=7aa497567c- Joe Dorris; yout- Episode 36https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=7686696a9e&e=7aa497567c- Stuart Wilensky; Episode 37https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=9c028fa23b&e=7aa497567c- Bruce Cairncross; Episode 38https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=99833f78f1&e=7aa497567c- Alex Schauss; Episode 39https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=082d14a355&e=7aa497567c- Andreas Stucki; Episode https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=3b1a0c57d0&e=7aa497567c 40https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=63e416823f&e=7aa497567c- Kimberly Vagner; Episode 41https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=f9e5a840c8&e=7aa497567c- Alan Hart; Episode 42https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=025164a2e3&e=7aa497567c- Elizabeth Rampe; Episode 43https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=469051ccdc&e=7aa497567c-  Alex Speer; Episode 44https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=31fdace5fa&e=7aa497567c-  Shelly Sergent; Episode 45https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=5cb6699194&e=7aa497567c- Edward Boehm; Episode 46https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=67dc681485&e=7aa497567c: Barbara Barrett/Carl Francis; Episode 47https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=09105dc5f4&e=7aa497567c: Nicolai Medvedev; Episode 48https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=a39d75b64d&e=7aa497567c: Rui Gallopim; Episode 49https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=5567ee3da5&e=7aa497567c: Robert Hazen; Episode 50https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=a8984462d9&e=7aa497567c: Wayne & Dona Leicht; Episode 51https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=7abbdf459b&e=7aa497567c: George Harlow; Episode 52https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=0a4e101301&e=7aa497567c: Aaron Palke; Episode 53https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=c9ceea5c52&e=7aa497567c: Doug and Rich Graeme; Episode 54https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=95b410bf09&e=7aa497567c: Laszlo Kupi; Episode 55https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=062290ffa6&e=7aa497567c: Virgil Lueth; Episode 56https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=d3e8fcc436&e=7aa497567c: Jean-Claude Boulliard. Episode 57https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=c330df4be0&e=7aa497567c: Eric Fritz; Episode 58https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=3e1a9a93fe&e=7aa497567c: Bob Jackson ; Episode 59https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=0ca6cb84b3&e=7aa497567c: Naomi Sarna; Episode 60https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=d89def1c7f&e=7aa497567c: Bob Downs; Episode 61https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=9f68becfa2&e=7aa497567c: Malcom Southwood; Episode 62https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=ecab0906c4&e=7aa497567c: Federico Barlocher; Episode 63https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=6a15661064&e=7aa497567c: Tomek Praszkier; Episode 64:https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=8aaa34c66d&e=7aa497567c Roy Starkey; Episode 65https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=5a60e523a0&e=7aa497567c: John White: Episode 66https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=487820eb54&e=7aa497567c; Aaron Celestian: Episode 67https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=51e77af607&e=7aa497567c; Ghulam Mustafa; Episode 68https://www.youtube.com/watch?v=cJ2ZtxFzsmg: Jeffrey Post; Episode 69https://www.youtube.com/watch?v=JMi9AO3df9A: Ksenia Levterova; Episode 70https://www.youtube.com/watch?v=n6hC54Habqc: Bob and Evan Jones; Episode 71https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=349b33c374&e=7aa497567c:David P. Wilber; Episode 72https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=408c5cdccd&e=7aa497567c: Jeff Swanger; Episode 73https://www.youtube.com/watch?v=v-hU0vWsq8o&list=PLYUSEUgiTprl9Vh7ZLXu8x_hHp0dN_TDJ&index=75: Skip Simmons; Episode 74https://www.youtube.com/watch?v=ju4-0nPwfho&list=PLYUSEUgiTprl9Vh7ZLXu8x_hHp0dN_TDJ&index=77: Les Presmyk


Mineral Talks LIVE - Brought to you by Bryan Swoboda of BlueCap Productions, Dr. Raquel Alonso-Perez of The Mineralogical and Geological Museum at Harvard Universityhttps://mgmh.fas.harvard.edu/ (MGMH), Dr. Eloïse Gaillou of the Musée de Minéralogie, l’École des Mines de Parishttps://www.musee.minesparis.psl.eu/Home/ and The Society of Mineral Museums Professionalshttp://www.smmp.net/ (SMMP).

[A picture containing text, font, typography  Description automatically generated]

[A picture containing text, font, design Description automatically generated]June 7 Webinar Do you want a more personal, in-depth connection with some of the most fascinating people in the mineral world? Then tune in to Mineral Talks LIVE - the monthly LIVE interview series where we sit down with guests from all over the world and talk rocks. Collectors, Curators, Curatrixes, Artists, Researchers, Publishers, Dealers and more. We get into their origin stories and get updated on some of the things they're working on now. It's always fun, often educational and one of the best ways to learn more about the people who make the mineral world what it is. Tune in and listen to our LIVE talks and get a chance to ask our guests your own questions. You are invited to the next Zoom webinar: Topic: Mineral Talks LIVE 7 Juney 2023 1:00 PM Eastern Time (US and Canada) Register in advance for this webinar: http://go.mineraltalksl ive.com/register<http://go.mineraltalksl%20ive.com/register> After registering, you will receive a confirmation email containing information about joining the webinar. Speaker - Gabriela Farfan [A person holding a rock Description automatically generated with low confidence] Dr. Gabriela Farfan is the Coralyn Whitney Curator of Gems and Minerals at the Smithsonian National Museum of Natural History.<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=298ce32967&e=7aa497567c> She began collecting minerals and gems at age six and turned her hobby into a career as a mineralogist, geochemist, and the first woman and Latina to become a Curator-in-Charge of the National Gem & Mineral Collection. She received her bachelors degree in Geological and Environmental Sciences from Stanford University<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=0f2aa91be0&e=7aa497567c> and her Ph.D. in Geochemistry from the MIT-WHOI Joint Program<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=c31fb14bb4&e=7aa497567c>. Her research focuses on the crystal structures and chemistry of minerals formed under varying conditions in order to answer questions in environmental mineralogy, biomineralization, and gem science. She primarily studies how biomineralizing organisms, such as corals and mollusks, make minerals and how these minerals record shifting aquatic environments in their crystallography and chemistry. Dr. Farfan is a proud longtime member of the Mineralogical Society of America<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=3714843f15&e=7aa497567c>, is currently on the board of the Society for Mineral Museum Professionals (SMMP<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=f35f82293e&e=7aa497567c>), and is looking forward to a long career in mineral and gem curation and mineral research at the Smithsonian. [A picture containing accessory, fashion accessory, jewellery, crown jewels Description automatically generated] The Inquisition Necklace - Fifteeen Colombian emeralds and 336 diamonds make up this necklace. The 45 ct emerald in the center represents the very best color and quality of emerald from Colombia. Smithsonian National Museum of Natural History. Photograph by Raquel Alonso-Perez . ************* If you have missed a previous episode, they are posted 30 days after the event. Posted so far are: Episode 01<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=4cc7401601&e=7aa497567c> - Eloïse Gaillou; Episode 02<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=be25ad613c&e=7aa497567c> - Robert Lavinsky; Episode 03<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=2809308e14&e=7aa497567c> - Peter Megaw; Episode 04<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=544e20e22e&e=7aa497567c> - Thomas Bellicam; Episode 05<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=7ef1078e56&e=7aa497567c> - Raquel Alonso-Perez; Episode 06<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=9311c5379e&e=7aa497567c> - Diana and Ian Bruce; Episode 07<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=1b97262aa9&e=7aa497567c> - Patrick Dreher; Episode 08<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=c57a9e458a&e=7aa497567c> - John Rakovan; Episode 09<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=7bbb90b2a1&e=7aa497567c> - Vera Hammer; Episode 10<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=c325b748e3&e=7aa497567c> - Ryan Roney; Episode 11<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=9050fb07b3&e=7aa497567c> - Bill Larson; Episode 12<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=f99a57ff27&e=7aa497567c> - Joylan Ralph; Episode 13<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=ffe1dbe7f6&e=7aa497567c> - Salim Eddé; Episode 14<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=14b97e2c84&e=7aa497567c> - George Rossman; Episode 15<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=7088026b84&e=7aa497567c> - The Collector's Edge; Episode 16<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=f5a3ab0c28&e=7aa497567c> - Daniel Trinchillo; Episode 17<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=459bbbae94&e=7aa497567c> - Jack Halpern; Episode 18<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=0619467145&e=7aa497567c>- Stefan Nicolescu; Episode 19<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=6b5eca2a84&e=7aa497567c> - Sami Makki, Matrix India; Episode 20<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=a2dcefed4f&e=7aa497567c> - Terry Wallace; Episode 21<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=9eee590c0c&e=7aa497567c> - Tama Higuchi; Episode 22<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=8cf309b791&e=7aa497567c> - Katherine Dunnell; Episode 23<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=0ecabf7b98&e=7aa497567c> - Emanuele Marini; Episode 24<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=1099b7e01f&e=7aa497567c> - Gail and Jim Spann; Episode 25<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=06cb4fd2ad&e=7aa497567c> - Gloria Staebler; Episode 26<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=a7c6825665&e=7aa497567c>- Frank Keutsch; Episode 27<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=3bac62fca5&e=7aa497567c>- Tom and Christi, The Min Record; Episode 28<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=e6d2126673&e=7aa497567c> - Fabian Wildfang; Episode 29<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=26ee8607fb&e=7aa497567c> - Jordi Fabre; Episode 30<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=7eb4f8f550&e=7aa497567c> - Bryan Swoboda; Episode 31<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=26f24eeb24&e=7aa497567c> - Gene Meieran; Episode 32<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=ce3871614b&e=7aa497567c> - Jeff Scovil; Episode 33<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=4c7a0bf389&e=7aa497567c>- Federico Pezzotta; Episode 34<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=6bad036c9e&e=7aa497567c>- Paula Crevoshay; Episode 35<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=a25c39747d&e=7aa497567c>- Joe Dorris; yout- Episode 36<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=7686696a9e&e=7aa497567c>- Stuart Wilensky; Episode 37<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=9c028fa23b&e=7aa497567c>- Bruce Cairncross; Episode 38<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=99833f78f1&e=7aa497567c>- Alex Schauss; Episode 39<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=082d14a355&e=7aa497567c>- Andreas Stucki; Episode <https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=3b1a0c57d0&e=7aa497567c> 40<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=63e416823f&e=7aa497567c>- Kimberly Vagner; Episode 41<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=f9e5a840c8&e=7aa497567c>- Alan Hart; Episode 42<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=025164a2e3&e=7aa497567c>- Elizabeth Rampe; Episode 43<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=469051ccdc&e=7aa497567c>- Alex Speer; Episode 44<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=31fdace5fa&e=7aa497567c>- Shelly Sergent; Episode 45<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=5cb6699194&e=7aa497567c>- Edward Boehm; Episode 46<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=67dc681485&e=7aa497567c>: Barbara Barrett/Carl Francis; Episode 47<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=09105dc5f4&e=7aa497567c>: Nicolai Medvedev; Episode 48<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=a39d75b64d&e=7aa497567c>: Rui Gallopim; Episode 49<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=5567ee3da5&e=7aa497567c>: Robert Hazen; Episode 50<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=a8984462d9&e=7aa497567c>: Wayne & Dona Leicht; Episode 51<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=7abbdf459b&e=7aa497567c>: George Harlow; Episode 52<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=0a4e101301&e=7aa497567c>: Aaron Palke; Episode 53<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=c9ceea5c52&e=7aa497567c>: Doug and Rich Graeme; Episode 54<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=95b410bf09&e=7aa497567c>: Laszlo Kupi; Episode 55<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=062290ffa6&e=7aa497567c>: Virgil Lueth; Episode 56<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=d3e8fcc436&e=7aa497567c>: Jean-Claude Boulliard. Episode 57<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=c330df4be0&e=7aa497567c>: Eric Fritz; Episode 58<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=3e1a9a93fe&e=7aa497567c>: Bob Jackson ; Episode 59<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=0ca6cb84b3&e=7aa497567c>: Naomi Sarna; Episode 60<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=d89def1c7f&e=7aa497567c>: Bob Downs; Episode 61<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=9f68becfa2&e=7aa497567c>: Malcom Southwood; Episode 62<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=ecab0906c4&e=7aa497567c>: Federico Barlocher; Episode 63<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=6a15661064&e=7aa497567c>: Tomek Praszkier; Episode 64:<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=8aaa34c66d&e=7aa497567c> Roy Starkey; Episode 65<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=5a60e523a0&e=7aa497567c>: John White: Episode 66<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=487820eb54&e=7aa497567c>; Aaron Celestian: Episode 67<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=51e77af607&e=7aa497567c>; Ghulam Mustafa; Episode 68<https://www.youtube.com/watch?v=cJ2ZtxFzsmg>: Jeffrey Post; Episode 69<https://www.youtube.com/watch?v=JMi9AO3df9A>: Ksenia Levterova; Episode 70<https://www.youtube.com/watch?v=n6hC54Habqc>: Bob and Evan Jones; Episode 71<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=349b33c374&e=7aa497567c>:David P. Wilber; Episode 72<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=408c5cdccd&e=7aa497567c>: Jeff Swanger; Episode 73<https://www.youtube.com/watch?v=v-hU0vWsq8o&list=PLYUSEUgiTprl9Vh7ZLXu8x_hHp0dN_TDJ&index=75>: Skip Simmons; Episode 74<https://www.youtube.com/watch?v=ju4-0nPwfho&list=PLYUSEUgiTprl9Vh7ZLXu8x_hHp0dN_TDJ&index=77>: Les Presmyk *************** Mineral Talks LIVE - Brought to you by Bryan Swoboda of BlueCap Productions, Dr. Raquel Alonso-Perez of The Mineralogical and Geological Museum at Harvard University<https://mgmh.fas.harvard.edu/> (MGMH), Dr. Eloïse Gaillou of the Musée de Minéralogie, l’École des Mines de Paris<https://www.musee.minesparis.psl.eu/Home/> and The Society of Mineral Museums Professionals<http://www.smmp.net/> (SMMP). [A picture containing text, font, typography Description automatically generated]
RR
Rachel Russell
Thu, Jun 1, 2023 4:50 PM

Dear American Mineralogist Readers,

Below are the Paper Highlights for this month’s issue of the American Mineralogist. You may also view the American Mineralogist Paper Highlights list at here (http://www.minsocam.org/MSA/Ammin/AM_NotableArticles.html).

The DOI links below will take you to the abstract on GeoScienceWorld.

If you have “IP” access via your institution’s library, it should reveal the whole paper. Consult your institution’s IT department or friendly librarian.

If you have MSA membership, then authenticate in from the American Mineralogist menu (herehttp://www.msapubs.org/ directly). Once at the portal page, click the right-side American Mineralogist link, enter your user name (e-mail address), and your password (membership number). Then search via your browser’s search tools for the paper you want to read. (On Rachel’s computer, it is control-f but we think that is little different for everyone.)

Note that on GSW you can sign up for a table of contents to be sent you when the issue is live -- this is a feature open to anyone who registers on the site.

Thank you for reading American Mineralogist.

Sincerely,
Hongwu Xu

Don Baker

A shallow salt pond analog for aqueous alteration on ancient Mars: Spectroscopy, mineralogy, and geochemistry of sediments from Antarctica's dry valleys
https://doi.org/10.2138/am-2022-8381
Understanding mineral formation on Mars is critical to understanding the planet's geochemical evolution, climate, and history of liquid water, as well as potential habitability. However, the formation processes behind mineral assemblages observed on Mars remain elusive. Here, Burton et al. examined aqueous alteration products developed in shallow sediments at a transient Antarctic brine pond as an example of the formation of clays, sulfates, and chlorides in extremely cold, water-poor, Mars-like settings.

Incorporation of chlorine in nuclear waste glasses using high-pressure vitrification: Solubility, speciation, and local environment of chlorine
https://doi.org/10.2138/am-2022-8599
Chlorine is one of the most important halogens involved in magmatic systems, representing a major troublesome element in the immobilization of nuclear waste, for which, however, there is a lack of fundamental understanding. Jolivet et al. investigated how chlorine dissolves in the structure of high-pressure borosilicate glasses using advanced spectroscopic techniques XPS and XAS. The speciation and the local environment of chlorine species have been determined and clarified. Furthermore, they propose an approach for predicting the chlorine solubility in a wide range of glass compositions.

Experimental constraints on miscibility gap between apatite and britholite and REE partitioning in an alkaline melt
https://doi.org/10.2138/am-2022-8535
Stepanov et al. performed synthesis of britholite and apatite from felsic melt, which showed that the addition of NaCl to the granite melt could have a pronounced effect on the behavior of REE. The change of the mineral association from monazite to apatite + britholite with the addition of NaCl illustrates the importance of halogens. REE entered the apatite structure via REE-Si substitutions. The results have implications for the interpretation of the phosphate associations in alkaline volcanic and plutonic rocks.

Thermal expansion of minerals in the tourmaline supergroup
https://doi.org/10.2138/am-2022-8580
The minerals in the tourmaline supergroup are widespread in Earth's crust, typically occurring in granites and granitic pegmatites, as well as in certain sedimentary and metamorphic rocks. In addition, tourmalines are the primary boron-bearing minerals in the earth. Tourmaline thermal-expansion data, therefore, are essential to the thermodynamic modelling not only of pegmatitic environments, but of all high-temperature B-rich mineral assemblages. Here, Hovis et al. provide an updated high-T dataset for the tourmaline mineral supergroup that will serve thermodynamic databases and will also be a valuable tool for better understanding tourmaline physical properties. Because present data demonstrate a similarity in thermal expansion among a wide variety of tourmaline compositions, there is the possibility of using end-member thermal expansion data for compositions that deviate significantly from those studied here.

Viscosity of Earth's inner core constrained by Fe-Ni interdiffusion in Fe-Si alloy in an internal-resistive-heated diamond anvil cell
https://doi.org/10.2138/am-2022-8541
Diffusivity in iron alloys at high pressures and temperatures imposes constraints on transport properties of the inner core, such as viscosity. Because silicon is among the most likely candidates for light elements in the inner core, the presence of Si must be considered when studying diffusivity in the Earth's inner core. Park et al. conducted diffusion experiments under pressures up to about 50 GPa using an internal-resistive-heated diamond anvil cell (DAC) that ensures stable and homogeneous heating compared with a conventional DAC heating method and thus allows them to conduct more reliable diffusion experiments under high pressures. They determined the coefficients of Fe-nickel (Ni) interdiffusion in the Fe-Si 2 wt.% alloy. The upper limit of the viscosity of the inner core inferred from these results is low, indicating that the Lorentz force is a plausible mechanism to deform the inner core.

The distribution of carbonate in apatite: the environment model
https://doi.org/10.2138/am-2022-8389
The location of carbonate in the structure of carbonated apatite, the closest analog to the inorganic portion of bones and teeth, is of importance in the biological function of this compound, especially the possibility of the involvement of structural carbonate in acid-base regulation. Yoder et al. demonstrate that the environment model originally proposed by Fleet (2017) for apatites prepared at high temperature and pressure is also valid for apatites produced synthetically or biologically at ambient pressures and low temperatures. The model suggests that considerably more carbonate is sequestered in the apatite channel than was previously thought and brings a greater focus on the roles of both types of carbonate in the biological function of carbonate in bone mineral.

Low-temperature crystallography and vibrational properties of rozenite (FeSO4·4H2O), a candidate mineral component of the polyhydrated sulfate deposits on Mars
https://doi.org/10.2138/am-2022-8502
The current generation Mars Rovers use Raman spectroscopy to search for minerals that are thought to have formed early in the martian history, when Mars was able to sustain surface waters. Raman spectroscopy is a powerful analytical tool but relies on accurate fingerprint reference spectra to identify minerals. Meusburger et al. show that the Raman fingerprint of rozenite was misinterpreted in the literature and suggest a workflow for the construction of a reliable Raman spectroscopic database for planetary exploration.

Hydrothermal fluid signatures of the Yulong porphyry Cu-Mo deposit: Clues from the composition and U-Pb dating of W-bearing rutile
https://doi.org/10.2138/am-2022-8453
Rutile enriched in V, W, Mo, Sn and Sb can be used as a geochemical fingerprint of a hydrothermal fluid associated with mineralization. Chen et al. investigated the geochemical composition and U-Pb dates of hydrothermal rutile from the Yulong porphyry Cu-Mo deposit in east Tibet, China. The analysis of rutile crystals indicates that the patchy or sector zonation imparts a marked control on the distribution of W, which substitutes for Ti by a coupled substitution with the trivalent cations in the rutile. In situ LA-ICP-MS U-Pb dating shows that the age of the W-bearing rutile grains overlaps the previously reported molybdenite Re-Os ages and provides the ability to directly determine the age of the Cu-Mo mineralization. The mechanism of the enrichment of tungsten is effectively driven by the halogen-rich (F, Cl) aqueous fluids during hydrothermal mineralization in the Yulong deposit. Consequently, the chemical or isotopic composition recorded in rutile provides comprehensive information for better understanding of the nature of hydrothermal fluids during the deposition of porphyry deposits.

Magnetic contributions to corundum-eskolaite and corundum-hematite phase equilibria: A DFT cluster expansion study
https://doi.org/10.2138/am-2022-8584
Magnetic contributions to mixing phase diagrams are challenging to compute, yet may have significant impact on phase stability. Pope et al. develop a protocol that includes spin orientation as an additional configurational component within multi-component cluster expansions between magnetic and non-magnetic metal oxide alloys. Two systems are compared, one where magnetic contributions to the calculated phase diagram are inconsequential (corundum-eskolaite) and one where they are absolutely essential (corundum-hematite) to accurately determine the solvus.

Microchemistry and magnesium isotope composition of the Purang ophiolitic chromitites (SW Tibet): New genetic inferences
https://doi.org/10.2138/am-2022-8392
Xiong et al. investigated the textural and compositional characteristics of silicate sulfide and exotic UHP-SuR mineral inclusions in Purang ophiolitic chromitite grains, suggesting a complex evolution of this Jurassic ophiolitic massif in SW Tibet. Evolution of these rocks included subduction of lithospheric slabs into the transition zone, crystallization of magnesiochromite and some massive chromitite at depth, incorporation of UHP and highly reduced phases into the chromitites, and entrapment of oceanic lithospheric slabs in a supra-subduction zone (SSZ) setting, where they undergo varying degrees of reaction with hydrous, SSZ melts.

Pyrite geochemistry in a porphyry-skarn Cu (Au) system and implications for ore formation and prospecting: Perspective from Xinqiao deposit, Eastern China
https://doi.org/10.2138/am-2022-8527
Xiao et al. investigated the geochemistry of pyrite in a porphyry-skarn Cu (Au) system in Xinqiao deposit, eastern China. Geological, trace element and S isotope analyses show that the colloform pyrite formed during early skarn mineralization. Colloform pyrite was produced by rapid decompression that triggered fluid boiling and cooling when the Cretaceous magmatic-hydrothermal fluid flowed along the Devonian-Carboniferous unconformity. Stratabound sulfide ore is sourced from Cretaceous magmatic-hydrothermal fluids, and formed from multi-stage magmatic-hydrothermal pulses. Co and Ni in pyrite increase towards porphyry and skarn ore, whereas As, Sb, Pb, Ag and Bi are enriched in pyrite in distal stratabound ore. The results indicate pyrite chemistry can be effective in discriminating the genesis of different deposit types related to porphyry-skarn systems and can potentially be used as a vectoring tool during exploration in the MLYB and elsewhere.

UV/Vis single-crystal spectroscopic investigation of almandine-pyrope and almandine-spessartine solid solutions: Part I. Spin-forbidden Fe2+,3+ and Mn2+ electronic-transition energies, crystal chemistry and bonding behavior
https://doi.org/10.2138/am-2022-8499
Investigation of the solid-solution behavior of aluminosilicate garnets is a long, continuing work in progress and much still needs to be studied. A fundamental problem is to understand the nature of local structural heterogeneity that arises through the exchange of different atoms of varying sizes and electronic properties. Geiger et al. measured natural almandine-pyrope, {Fe2+3x,Mg3-3x}Al2O12, and almandine-spessartine, {Fe2+3x,Mn2+3-3x}Al2O12, crystals using UV/Vis/NIR (~29000 to 10000 cm-1) optical absorption spectroscopy. The spectra and changes in energy of a number of Fe2+ and Mn2+ spin-forbidden electronic transitions were analyzed as a function of garnet composition across both binaries in order to understand the underlying bonding behavior.

Single-crystal UV/Vis optical absorption spectra of almandine-bearing and spessartine garnet: Part II. An analysis of the spin-forbidden bands of Fe2+, Mn2+, and Fe3+
https://doi.org/10.2138/am-2022-8500
Almandine and spessartine are common occurring aluminosilicate garnets with the ideal end-member crystal-chemical formulas {Fe2+3}Al2O12 and {Mn2+3}Al2O12. Garnet is a remarkable phase in several ways and much research in the Earth Sciences has focused on the different rock-forming species. Taran et al. demonstrate that a crystal-chemical aspect of significance is the eight-fold or triangular dodecahedral coordination of Fe2+ (d6) and Mn2+ (d5) by oxygen anions and the various physical properties arising from this. Different types of electronic transitions in garnet, as expressed in the NIR/Vis/UV regions of the electromagnetic spectrum, can result from the Fe2+ and Mn2+ cations. The transitions can be studied by optical absorption spectroscopy, which yields information on chemical bonding.

Single-crystal UV/Vis absorption spectroscopy of aluminosilicate garnet: Part III. {Fe2+} + [Fe3+] à {Fe3+} + [Fe2+] intervalence charge transfer
https://doi.org/10.2138/am-2022-8756
The various intervalence charge transfer (IVCT) mechanisms that can occur in silicate garnets, with a general crystal-chemical formula {X3}Y2O12, are not fully understood. Geiger and Taran conducted spectroscopic measurements on aluminosilicate garnets, with a focus on understanding IVCT behavior in almandine-rich, spessartine-rich and grossular-rich crystals and one intermediate composition almandine-pyrope garnet. The authors also reviewed and analyzed various possible IVCT mechanisms in both Ca-Ti-bearing and aluminosilicate garnets. The goal is to achieve a better and more complete understanding of the electronic transition behavior of an important rock-forming mineral group.

A novel method for experiments in a one-atmosphere box furnace
https://doi.org/10.2138/am-2022-8867
This letter by Linzerova et al. presents a new high-temperature experimental method for one-atmosphere box furnace, utilizing commercially available low-cost materials. The method was designed to facilitate textural analysis of voluminous samples, with no need to use noble-metal capsules.

Dear American Mineralogist Readers, Below are the Paper Highlights for this month’s issue of the American Mineralogist. You may also view the American Mineralogist Paper Highlights list at here (http://www.minsocam.org/MSA/Ammin/AM_NotableArticles.html). The DOI links below will take you to the abstract on GeoScienceWorld. If you have “IP” access via your institution’s library, it should reveal the whole paper. Consult your institution’s IT department or friendly librarian. If you have MSA membership, then authenticate in from the American Mineralogist menu (here<http://www.msapubs.org/> directly). Once at the portal page, click the right-side American Mineralogist link, enter your user name (e-mail address), and your password (membership number). Then search via your browser’s search tools for the paper you want to read. (On Rachel’s computer, it is control-f but we think that is little different for everyone.) Note that on GSW you can sign up for a table of contents to be sent you when the issue is live -- this is a feature open to anyone who registers on the site. Thank you for reading American Mineralogist. Sincerely, Hongwu Xu Don Baker A shallow salt pond analog for aqueous alteration on ancient Mars: Spectroscopy, mineralogy, and geochemistry of sediments from Antarctica's dry valleys https://doi.org/10.2138/am-2022-8381 Understanding mineral formation on Mars is critical to understanding the planet's geochemical evolution, climate, and history of liquid water, as well as potential habitability. However, the formation processes behind mineral assemblages observed on Mars remain elusive. Here, Burton et al. examined aqueous alteration products developed in shallow sediments at a transient Antarctic brine pond as an example of the formation of clays, sulfates, and chlorides in extremely cold, water-poor, Mars-like settings. Incorporation of chlorine in nuclear waste glasses using high-pressure vitrification: Solubility, speciation, and local environment of chlorine https://doi.org/10.2138/am-2022-8599 Chlorine is one of the most important halogens involved in magmatic systems, representing a major troublesome element in the immobilization of nuclear waste, for which, however, there is a lack of fundamental understanding. Jolivet et al. investigated how chlorine dissolves in the structure of high-pressure borosilicate glasses using advanced spectroscopic techniques XPS and XAS. The speciation and the local environment of chlorine species have been determined and clarified. Furthermore, they propose an approach for predicting the chlorine solubility in a wide range of glass compositions. Experimental constraints on miscibility gap between apatite and britholite and REE partitioning in an alkaline melt https://doi.org/10.2138/am-2022-8535 Stepanov et al. performed synthesis of britholite and apatite from felsic melt, which showed that the addition of NaCl to the granite melt could have a pronounced effect on the behavior of REE. The change of the mineral association from monazite to apatite + britholite with the addition of NaCl illustrates the importance of halogens. REE entered the apatite structure via REE-Si substitutions. The results have implications for the interpretation of the phosphate associations in alkaline volcanic and plutonic rocks. Thermal expansion of minerals in the tourmaline supergroup https://doi.org/10.2138/am-2022-8580 The minerals in the tourmaline supergroup are widespread in Earth's crust, typically occurring in granites and granitic pegmatites, as well as in certain sedimentary and metamorphic rocks. In addition, tourmalines are the primary boron-bearing minerals in the earth. Tourmaline thermal-expansion data, therefore, are essential to the thermodynamic modelling not only of pegmatitic environments, but of all high-temperature B-rich mineral assemblages. Here, Hovis et al. provide an updated high-T dataset for the tourmaline mineral supergroup that will serve thermodynamic databases and will also be a valuable tool for better understanding tourmaline physical properties. Because present data demonstrate a similarity in thermal expansion among a wide variety of tourmaline compositions, there is the possibility of using end-member thermal expansion data for compositions that deviate significantly from those studied here. Viscosity of Earth's inner core constrained by Fe-Ni interdiffusion in Fe-Si alloy in an internal-resistive-heated diamond anvil cell https://doi.org/10.2138/am-2022-8541 Diffusivity in iron alloys at high pressures and temperatures imposes constraints on transport properties of the inner core, such as viscosity. Because silicon is among the most likely candidates for light elements in the inner core, the presence of Si must be considered when studying diffusivity in the Earth's inner core. Park et al. conducted diffusion experiments under pressures up to about 50 GPa using an internal-resistive-heated diamond anvil cell (DAC) that ensures stable and homogeneous heating compared with a conventional DAC heating method and thus allows them to conduct more reliable diffusion experiments under high pressures. They determined the coefficients of Fe-nickel (Ni) interdiffusion in the Fe-Si 2 wt.% alloy. The upper limit of the viscosity of the inner core inferred from these results is low, indicating that the Lorentz force is a plausible mechanism to deform the inner core. The distribution of carbonate in apatite: the environment model https://doi.org/10.2138/am-2022-8389 The location of carbonate in the structure of carbonated apatite, the closest analog to the inorganic portion of bones and teeth, is of importance in the biological function of this compound, especially the possibility of the involvement of structural carbonate in acid-base regulation. Yoder et al. demonstrate that the environment model originally proposed by Fleet (2017) for apatites prepared at high temperature and pressure is also valid for apatites produced synthetically or biologically at ambient pressures and low temperatures. The model suggests that considerably more carbonate is sequestered in the apatite channel than was previously thought and brings a greater focus on the roles of both types of carbonate in the biological function of carbonate in bone mineral. Low-temperature crystallography and vibrational properties of rozenite (FeSO4·4H2O), a candidate mineral component of the polyhydrated sulfate deposits on Mars https://doi.org/10.2138/am-2022-8502 The current generation Mars Rovers use Raman spectroscopy to search for minerals that are thought to have formed early in the martian history, when Mars was able to sustain surface waters. Raman spectroscopy is a powerful analytical tool but relies on accurate fingerprint reference spectra to identify minerals. Meusburger et al. show that the Raman fingerprint of rozenite was misinterpreted in the literature and suggest a workflow for the construction of a reliable Raman spectroscopic database for planetary exploration. Hydrothermal fluid signatures of the Yulong porphyry Cu-Mo deposit: Clues from the composition and U-Pb dating of W-bearing rutile https://doi.org/10.2138/am-2022-8453 Rutile enriched in V, W, Mo, Sn and Sb can be used as a geochemical fingerprint of a hydrothermal fluid associated with mineralization. Chen et al. investigated the geochemical composition and U-Pb dates of hydrothermal rutile from the Yulong porphyry Cu-Mo deposit in east Tibet, China. The analysis of rutile crystals indicates that the patchy or sector zonation imparts a marked control on the distribution of W, which substitutes for Ti by a coupled substitution with the trivalent cations in the rutile. In situ LA-ICP-MS U-Pb dating shows that the age of the W-bearing rutile grains overlaps the previously reported molybdenite Re-Os ages and provides the ability to directly determine the age of the Cu-Mo mineralization. The mechanism of the enrichment of tungsten is effectively driven by the halogen-rich (F, Cl) aqueous fluids during hydrothermal mineralization in the Yulong deposit. Consequently, the chemical or isotopic composition recorded in rutile provides comprehensive information for better understanding of the nature of hydrothermal fluids during the deposition of porphyry deposits. Magnetic contributions to corundum-eskolaite and corundum-hematite phase equilibria: A DFT cluster expansion study https://doi.org/10.2138/am-2022-8584 Magnetic contributions to mixing phase diagrams are challenging to compute, yet may have significant impact on phase stability. Pope et al. develop a protocol that includes spin orientation as an additional configurational component within multi-component cluster expansions between magnetic and non-magnetic metal oxide alloys. Two systems are compared, one where magnetic contributions to the calculated phase diagram are inconsequential (corundum-eskolaite) and one where they are absolutely essential (corundum-hematite) to accurately determine the solvus. Microchemistry and magnesium isotope composition of the Purang ophiolitic chromitites (SW Tibet): New genetic inferences https://doi.org/10.2138/am-2022-8392 Xiong et al. investigated the textural and compositional characteristics of silicate sulfide and exotic UHP-SuR mineral inclusions in Purang ophiolitic chromitite grains, suggesting a complex evolution of this Jurassic ophiolitic massif in SW Tibet. Evolution of these rocks included subduction of lithospheric slabs into the transition zone, crystallization of magnesiochromite and some massive chromitite at depth, incorporation of UHP and highly reduced phases into the chromitites, and entrapment of oceanic lithospheric slabs in a supra-subduction zone (SSZ) setting, where they undergo varying degrees of reaction with hydrous, SSZ melts. Pyrite geochemistry in a porphyry-skarn Cu (Au) system and implications for ore formation and prospecting: Perspective from Xinqiao deposit, Eastern China https://doi.org/10.2138/am-2022-8527 Xiao et al. investigated the geochemistry of pyrite in a porphyry-skarn Cu (Au) system in Xinqiao deposit, eastern China. Geological, trace element and S isotope analyses show that the colloform pyrite formed during early skarn mineralization. Colloform pyrite was produced by rapid decompression that triggered fluid boiling and cooling when the Cretaceous magmatic-hydrothermal fluid flowed along the Devonian-Carboniferous unconformity. Stratabound sulfide ore is sourced from Cretaceous magmatic-hydrothermal fluids, and formed from multi-stage magmatic-hydrothermal pulses. Co and Ni in pyrite increase towards porphyry and skarn ore, whereas As, Sb, Pb, Ag and Bi are enriched in pyrite in distal stratabound ore. The results indicate pyrite chemistry can be effective in discriminating the genesis of different deposit types related to porphyry-skarn systems and can potentially be used as a vectoring tool during exploration in the MLYB and elsewhere. UV/Vis single-crystal spectroscopic investigation of almandine-pyrope and almandine-spessartine solid solutions: Part I. Spin-forbidden Fe2+,3+ and Mn2+ electronic-transition energies, crystal chemistry and bonding behavior https://doi.org/10.2138/am-2022-8499 Investigation of the solid-solution behavior of aluminosilicate garnets is a long, continuing work in progress and much still needs to be studied. A fundamental problem is to understand the nature of local structural heterogeneity that arises through the exchange of different atoms of varying sizes and electronic properties. Geiger et al. measured natural almandine-pyrope, {Fe2+3x,Mg3-3x}[Al2](Si3)O12, and almandine-spessartine, {Fe2+3x,Mn2+3-3x}[Al2](Si3)O12, crystals using UV/Vis/NIR (~29000 to 10000 cm-1) optical absorption spectroscopy. The spectra and changes in energy of a number of Fe2+ and Mn2+ spin-forbidden electronic transitions were analyzed as a function of garnet composition across both binaries in order to understand the underlying bonding behavior. Single-crystal UV/Vis optical absorption spectra of almandine-bearing and spessartine garnet: Part II. An analysis of the spin-forbidden bands of Fe2+, Mn2+, and Fe3+ https://doi.org/10.2138/am-2022-8500 Almandine and spessartine are common occurring aluminosilicate garnets with the ideal end-member crystal-chemical formulas {Fe2+3}[Al2](Si3)O12 and {Mn2+3}[Al2](Si3)O12. Garnet is a remarkable phase in several ways and much research in the Earth Sciences has focused on the different rock-forming species. Taran et al. demonstrate that a crystal-chemical aspect of significance is the eight-fold or triangular dodecahedral coordination of Fe2+ (d6) and Mn2+ (d5) by oxygen anions and the various physical properties arising from this. Different types of electronic transitions in garnet, as expressed in the NIR/Vis/UV regions of the electromagnetic spectrum, can result from the Fe2+ and Mn2+ cations. The transitions can be studied by optical absorption spectroscopy, which yields information on chemical bonding. Single-crystal UV/Vis absorption spectroscopy of aluminosilicate garnet: Part III. {Fe2+} + [Fe3+] à {Fe3+} + [Fe2+] intervalence charge transfer https://doi.org/10.2138/am-2022-8756 The various intervalence charge transfer (IVCT) mechanisms that can occur in silicate garnets, with a general crystal-chemical formula {X3}[Y2](Z3)O12, are not fully understood. Geiger and Taran conducted spectroscopic measurements on aluminosilicate garnets, with a focus on understanding IVCT behavior in almandine-rich, spessartine-rich and grossular-rich crystals and one intermediate composition almandine-pyrope garnet. The authors also reviewed and analyzed various possible IVCT mechanisms in both Ca-Ti-bearing and aluminosilicate garnets. The goal is to achieve a better and more complete understanding of the electronic transition behavior of an important rock-forming mineral group. A novel method for experiments in a one-atmosphere box furnace https://doi.org/10.2138/am-2022-8867 This letter by Linzerova et al. presents a new high-temperature experimental method for one-atmosphere box furnace, utilizing commercially available low-cost materials. The method was designed to facilitate textural analysis of voluminous samples, with no need to use noble-metal capsules.