Hi folks, Because I’m teaching igneous and metamorphic petrology partly remotely, I’ve started uploading video of all the thin sections my students are supposed to be looking at. Each video is ~30s long, first showing plane polarized light, then cross-polars, each time rotating the stage either 180 or 270°. There are currently between 40 and 50 on my YouTube channel. Here’s the specific optical mineralogy playlist (you want to use maximum resolution when viewing, BTW): https://www.youtube.com/playlist?list=PL8dDgAwuMuPTXCj0MPO_G6jTz4pzXVcZi <https://www.youtube.com/playlist?list=PL8dDgAwuMuPTXCj0MPO_G6jTz4pzXVcZi> For instruction, these will be most useful if you already know what minerals are in the sections. I can’t post that publicly (defeats the purpose for my students), but if you want a guide, I have a Google Sheet, and I’ll send you the link. Briefly, though, these emphasize metamorphic rocks (surprise!), although there are few igneous rocks and I’ll add more soon. There are several interesting AFM assemblages, various examples of pleochroism (nice tourmaline contrasted with biotite and hornblende), cleavage, relief, a few facies assemblages. I made a little guide in the Google Sheet that lists what I use the sections to teach about along with a list of minerals that can be seen in each video (not necessarily the complete assemblage). I know that YouTube is not available in China, and maybe also in other countries. If you don’t have access to YouTube, my TA for the course, Buchanan Kerswell, is also posting the videos to his website: https://buchanankerswell.com/ <https://buchanankerswell.com/> Look under “Portfolio” Actually, I think it’s easier to preview the videos on Buchanan’s website, so you might go there first. A few other notes: •I lost the password to my old YouTube channel “OpticalMineral” so I can’t edit anything there, but it still has several optical mineralogy videos: https://www.youtube.com/user/OpticalMineral <https://www.youtube.com/user/OpticalMineral> I think they must be useful because they’ve seen over 100k views (but…could this be mostly traffic from hallucinogenic drug parties wanting to look at colorful spinning images…?). Unlike the new videos, they're labeled with the key optical phenomenon I try hardest to illustrate for students: pleochroism, radiation haloes, birds-eye extinction, parallel vs. inclined extinction, variable relief, etc. Also has a few minerals that are a little tricky, like cordierite, or distinctive, like chiastolite. I use them in my classes. •Last semester I uploaded a few straight-up mineralogy videos on crystallography, packing, and X-rays. They’re at this playlist: https://www.youtube.com/playlist?list=PL8dDgAwuMuPRooZXZ5ajv5zlbvTLNev43 <https://www.youtube.com/playlist?list=PL8dDgAwuMuPRooZXZ5ajv5zlbvTLNev43> I’ll be adding more to this list eventually, for when I teach mineralogy next. •If anyone wants any of the materials I use for teaching (lectures, problem sets, labs, whatever), please let me know. I’m happy to share. Hope everyone is well, Matt

Hello all- Does anyone know of a demonstration of decompression melting that could be done "live" in a classroom? Ideally a nontoxic material that is solid under compression (perhaps held in a vise) at near room temperatures and visibly melts a bit when the pressure is released. I know, too much to ask for. Cheers, Mike ___________________________________________________ Dr J. Michael Palin Department of Geology University of Otago PO Box 56, Dunedin 9054 (post) 360 Leith Street, North Dunedin 9016 (courier) New Zealand +64-3-479-9083 (office) +64-3-479-7527 (fax) +64-3-479-7519 (admin) ORCID 0000-0002-4972-7302 _______________________________ Who will prefer the jingle of jade pendants If they once have heard stone growing in a cliff? - Lao Tzu

Hi Mike, I have never tried it, but gallium seems like a good candidate but for the opposite effect. The liquid is more dense than the solid, so it melts as you apply pressure. It melts at 29.8 C (85.6 F) so with just a little heating you can get it near its melting point in the lab. Application of a little pressure should melt it. It might be hard to observe in a vise, since as soon as pressure is released (i.e. a droplet) it will freeze. Mark -----Original Message----- From: Mike Palin via MSA-talk <msa-talk@minlists.org> Sent: Tuesday, February 23, 2021 2:14 PM To: msa-talk@minlists.org Subject: [MSA-talk] Classroom demonstration of decompression melting? Hello all- Does anyone know of a demonstration of decompression melting that could be done "live" in a classroom? Ideally a nontoxic material that is solid under compression (perhaps held in a vise) at near room temperatures and visibly melts a bit when the pressure is released. I know, too much to ask for. Cheers, Mike ___________________________________________________ Dr J. Michael Palin Department of Geology University of Otago PO Box 56, Dunedin 9054 (post) 360 Leith Street, North Dunedin 9016 (courier) New Zealand +64-3-479-9083 (office) +64-3-479-7527 (fax) +64-3-479-7519 (admin) ORCID 0000-0002-4972-7302 _______________________________ Who will prefer the jingle of jade pendants If they once have heard stone growing in a cliff? - Lao Tzu _______________________________________________ MSA-talk mailing list -- msa-talk@minlists.org To unsubscribe send an email to msa-talk-leave@minlists.org

I highly recommend reading *The Disappearing Spoon* that features a story about gallium and many other great elements in the periodic table. [image: image.png] On Tue, Feb 23, 2021 at 3:52 PM Mark Rivers via MSA-talk < msa-talk@minlists.org> wrote: > Hi Mike, > > I have never tried it, but gallium seems like a good candidate but for the > opposite effect. The liquid is more dense than the solid, so it melts as > you apply pressure. It melts at 29.8 C (85.6 F) so with just a little > heating you can get it near its melting point in the lab. Application of a > little pressure should melt it. It might be hard to observe in a vise, > since as soon as pressure is released (i.e. a droplet) it will freeze. > > Mark > > > -----Original Message----- > From: Mike Palin via MSA-talk <msa-talk@minlists.org> > Sent: Tuesday, February 23, 2021 2:14 PM > To: msa-talk@minlists.org > Subject: [MSA-talk] Classroom demonstration of decompression melting? > > Hello all- > > Does anyone know of a demonstration of decompression melting that could be > done "live" in a classroom? Ideally a nontoxic material that is solid under > compression (perhaps held in a vise) at near room temperatures and visibly > melts a bit when the pressure is released. I know, too much to ask for. > > Cheers, > Mike > > ___________________________________________________ > Dr J. Michael Palin > Department of Geology > University of Otago > PO Box 56, Dunedin 9054 (post) > 360 Leith Street, North Dunedin 9016 (courier) New Zealand > +64-3-479-9083 (office) > +64-3-479-7527 (fax) > +64-3-479-7519 (admin) > ORCID 0000-0002-4972-7302 > _______________________________ > Who will prefer the jingle of jade pendants If they once have heard stone > growing in a cliff? > - Lao Tzu > _______________________________________________ > MSA-talk mailing list -- msa-talk@minlists.org To unsubscribe send an > email to msa-talk-leave@minlists.org > _______________________________________________ > MSA-talk mailing list -- msa-talk@minlists.org > To unsubscribe send an email to msa-talk-leave@minlists.org >

Not everyone has one, but pure water in the diamond anvil cell works well. You can look into your diamond cell with a microscope and camera and project the image. As you increase pressure to ~1 GPa, you form ice VI at ambient temperature, which you can melt by releasing pressure. -- Sébastien Merkel UMET - Unité Matériaux et Transformations Université de Lille - CNRS http://merkel.texture.rocks/ Tel: +33 (0)3 20 43 65 16 E-mail: sebastien.merkel@univ-lille.fr Le 23/02/2021 à 21:51, Mark Rivers via MSA-talk a écrit : > Hi Mike, > > I have never tried it, but gallium seems like a good candidate but for the opposite effect. The liquid is more dense than the solid, so it melts as you apply pressure. It melts at 29.8 C (85.6 F) so with just a little heating you can get it near its melting point in the lab. Application of a little pressure should melt it. It might be hard to observe in a vise, since as soon as pressure is released (i.e. a droplet) it will freeze. > > Mark > > > -----Original Message----- > From: Mike Palin via MSA-talk <msa-talk@minlists.org> > Sent: Tuesday, February 23, 2021 2:14 PM > To: msa-talk@minlists.org > Subject: [MSA-talk] Classroom demonstration of decompression melting? > > Hello all- > > Does anyone know of a demonstration of decompression melting that could be done "live" in a classroom? Ideally a nontoxic material that is solid under compression (perhaps held in a vise) at near room temperatures and visibly melts a bit when the pressure is released. I know, too much to ask for. > > Cheers, > Mike > > ___________________________________________________ > Dr J. Michael Palin > Department of Geology > University of Otago > PO Box 56, Dunedin 9054 (post) > 360 Leith Street, North Dunedin 9016 (courier) New Zealand > +64-3-479-9083 (office) > +64-3-479-7527 (fax) > +64-3-479-7519 (admin) > ORCID 0000-0002-4972-7302 > _______________________________ > Who will prefer the jingle of jade pendants If they once have heard stone growing in a cliff? > - Lao Tzu > _______________________________________________ > MSA-talk mailing list -- msa-talk@minlists.org To unsubscribe send an email to msa-talk-leave@minlists.org > _______________________________________________ > MSA-talk mailing list -- msa-talk@minlists.org > To unsubscribe send an email to msa-talk-leave@minlists.org >

A video of this would be great! On Wed, Feb 24, 2021 at 10:26 AM Sébastien Merkel via MSA-talk < msa-talk@minlists.org> wrote: > > Not everyone has one, but pure water in the diamond anvil cell works > well. You can look into your diamond cell with a microscope and camera > and project the image. > > As you increase pressure to ~1 GPa, you form ice VI at ambient > temperature, which you can melt by releasing pressure. > > > -- > Sébastien Merkel > > UMET - Unité Matériaux et Transformations > Université de Lille - CNRS > http://merkel.texture.rocks/ > Tel: +33 (0)3 20 43 65 16 > E-mail: sebastien.merkel@univ-lille.fr > > Le 23/02/2021 à 21:51, Mark Rivers via MSA-talk a écrit : > > Hi Mike, > > > > I have never tried it, but gallium seems like a good candidate but for > the opposite effect. The liquid is more dense than the solid, so it melts > as you apply pressure. It melts at 29.8 C (85.6 F) so with just a little > heating you can get it near its melting point in the lab. Application of a > little pressure should melt it. It might be hard to observe in a vise, > since as soon as pressure is released (i.e. a droplet) it will freeze. > > > > Mark > > > > > > -----Original Message----- > > From: Mike Palin via MSA-talk <msa-talk@minlists.org> > > Sent: Tuesday, February 23, 2021 2:14 PM > > To: msa-talk@minlists.org > > Subject: [MSA-talk] Classroom demonstration of decompression melting? > > > > Hello all- > > > > Does anyone know of a demonstration of decompression melting that could > be done "live" in a classroom? Ideally a nontoxic material that is solid > under compression (perhaps held in a vise) at near room temperatures and > visibly melts a bit when the pressure is released. I know, too much to ask > for. > > > > Cheers, > > Mike > > > > ___________________________________________________ > > Dr J. Michael Palin > > Department of Geology > > University of Otago > > PO Box 56, Dunedin 9054 (post) > > 360 Leith Street, North Dunedin 9016 (courier) New Zealand > > +64-3-479-9083 (office) > > +64-3-479-7527 (fax) > > +64-3-479-7519 (admin) > > ORCID 0000-0002-4972-7302 > > _______________________________ > > Who will prefer the jingle of jade pendants If they once have heard > stone growing in a cliff? > > - Lao Tzu > > _______________________________________________ > > MSA-talk mailing list -- msa-talk@minlists.org To unsubscribe send an > email to msa-talk-leave@minlists.org > > _______________________________________________ > > MSA-talk mailing list -- msa-talk@minlists.org > > To unsubscribe send an email to msa-talk-leave@minlists.org > > > _______________________________________________ > MSA-talk mailing list -- msa-talk@minlists.org > To unsubscribe send an email to msa-talk-leave@minlists.org > -- Fred Marton, PhD Department of Physical Sciences Bergen Community College 400 Paramus Rd. Paramus, NJ 07652-1508 +1-201-493-7518

I do recall seeing videos of this several years ago - maybe from I-Ming Chou’s group or from Russ Hemley’s group? > On Feb 24, 2021, at 10:47 AM, Fred Marton via MSA-talk <msa-talk@minlists.org> wrote: > > A video of this would be great! > > On Wed, Feb 24, 2021 at 10:26 AM Sébastien Merkel via MSA-talk <msa-talk@minlists.org> wrote: > > Not everyone has one, but pure water in the diamond anvil cell works > well. You can look into your diamond cell with a microscope and camera > and project the image. > > As you increase pressure to ~1 GPa, you form ice VI at ambient > temperature, which you can melt by releasing pressure. > > > -- > Sébastien Merkel > > UMET - Unité Matériaux et Transformations > Université de Lille - CNRS > http://merkel.texture.rocks/ > Tel: +33 (0)3 20 43 65 16 > E-mail: sebastien.merkel@univ-lille.fr > > Le 23/02/2021 à 21:51, Mark Rivers via MSA-talk a écrit : > > Hi Mike, > > > > I have never tried it, but gallium seems like a good candidate but for the opposite effect. The liquid is more dense than the solid, so it melts as you apply pressure. It melts at 29.8 C (85.6 F) so with just a little heating you can get it near its melting point in the lab. Application of a little pressure should melt it. It might be hard to observe in a vise, since as soon as pressure is released (i.e. a droplet) it will freeze. > > > > Mark > > > > > > -----Original Message----- > > From: Mike Palin via MSA-talk <msa-talk@minlists.org> > > Sent: Tuesday, February 23, 2021 2:14 PM > > To: msa-talk@minlists.org > > Subject: [MSA-talk] Classroom demonstration of decompression melting? > > > > Hello all- > > > > Does anyone know of a demonstration of decompression melting that could be done "live" in a classroom? Ideally a nontoxic material that is solid under compression (perhaps held in a vise) at near room temperatures and visibly melts a bit when the pressure is released. I know, too much to ask for. > > > > Cheers, > > Mike > > > > ___________________________________________________ > > Dr J. Michael Palin > > Department of Geology > > University of Otago > > PO Box 56, Dunedin 9054 (post) > > 360 Leith Street, North Dunedin 9016 (courier) New Zealand > > +64-3-479-9083 (office) > > +64-3-479-7527 (fax) > > +64-3-479-7519 (admin) > > ORCID 0000-0002-4972-7302 > > _______________________________ > > Who will prefer the jingle of jade pendants If they once have heard stone growing in a cliff? > > - Lao Tzu > > _______________________________________________ > > MSA-talk mailing list -- msa-talk@minlists.org To unsubscribe send an email to msa-talk-leave@minlists.org > > _______________________________________________ > > MSA-talk mailing list -- msa-talk@minlists.org > > To unsubscribe send an email to msa-talk-leave@minlists.org > > > _______________________________________________ > MSA-talk mailing list -- msa-talk@minlists.org > To unsubscribe send an email to msa-talk-leave@minlists.org > > > -- > Fred Marton, PhD > Department of Physical Sciences > Bergen Community College > 400 Paramus Rd. > Paramus, NJ 07652-1508 > +1-201-493-7518 > _______________________________________________ > MSA-talk mailing list -- msa-talk@minlists.org > To unsubscribe send an email to msa-talk-leave@minlists.org

While not ideal, there are several videos online of boiling cold water in a vacuum. It's not melting, but it is a phase change under decompression. Best, Dr. Erik Haroldson (he/him/his) Assistant Professor - Geology Austin Peay State University Department of Geosciences PO Box 4418 Clarksville, TN 37044 931-221-7449 haroldsone@apsu.edu ________________________________ From: Robert Bodnar via MSA-talk <msa-talk@minlists.org> Sent: Wednesday, February 24, 2021 10:04 AM To: Fred Marton <fmarton@bergen.edu> Cc: Sébastien Merkel <sebastien.merkel@univ-lille.fr>; msa-talk@minlists.org <msa-talk@minlists.org> Subject: [External] [MSA-talk] Re: [EXT] Re: Classroom demonstration of decompression melting? *** This is an EXTERNAL email. Please exercise caution. DO NOT open attachments or click links from unknown senders or unexpected email - APSU IT Security. *** ________________________________ I do recall seeing videos of this several years ago - maybe from I-Ming Chou’s group or from Russ Hemley’s group? > On Feb 24, 2021, at 10:47 AM, Fred Marton via MSA-talk <msa-talk@minlists.org> wrote: > > A video of this would be great! > > On Wed, Feb 24, 2021 at 10:26 AM Sébastien Merkel via MSA-talk <msa-talk@minlists.org> wrote: > > Not everyone has one, but pure water in the diamond anvil cell works > well. You can look into your diamond cell with a microscope and camera > and project the image. > > As you increase pressure to ~1 GPa, you form ice VI at ambient > temperature, which you can melt by releasing pressure. > > > -- > Sébastien Merkel > > UMET - Unité Matériaux et Transformations > Université de Lille - CNRS > https://urldefense.proofpoint.com/v2/url?u=http-3A__merkel.texture.rocks_&d=DwIGaQ&c=pFsveJJPHV1MuWVdwlSI7Q&r=32wxqqb-3uc9tepYb0nfvTnpgRMPTG44LLA9t9E70jQ&m=231s0MTjSefNQi7jjRP92ezYgQnvHQYdMhSjyLpC1q8&s=musRt8f2kA-4_HAXucb0FsKkejDfKT1N4QKv2i56Rbc&e= > Tel: +33 (0)3 20 43 65 16 > E-mail: sebastien.merkel@univ-lille.fr > > Le 23/02/2021 à 21:51, Mark Rivers via MSA-talk a écrit : > > Hi Mike, > > > > I have never tried it, but gallium seems like a good candidate but for the opposite effect. The liquid is more dense than the solid, so it melts as you apply pressure. It melts at 29.8 C (85.6 F) so with just a little heating you can get it near its melting point in the lab. Application of a little pressure should melt it. It might be hard to observe in a vise, since as soon as pressure is released (i.e. a droplet) it will freeze. > > > > Mark > > > > > > -----Original Message----- > > From: Mike Palin via MSA-talk <msa-talk@minlists.org> > > Sent: Tuesday, February 23, 2021 2:14 PM > > To: msa-talk@minlists.org > > Subject: [MSA-talk] Classroom demonstration of decompression melting? > > > > Hello all- > > > > Does anyone know of a demonstration of decompression melting that could be done "live" in a classroom? Ideally a nontoxic material that is solid under compression (perhaps held in a vise) at near room temperatures and visibly melts a bit when the pressure is released. I know, too much to ask for. > > > > Cheers, > > Mike > > > > ___________________________________________________ > > Dr J. Michael Palin > > Department of Geology > > University of Otago > > PO Box 56, Dunedin 9054 (post) > > 360 Leith Street, North Dunedin 9016 (courier) New Zealand > > +64-3-479-9083 (office) > > +64-3-479-7527 (fax) > > +64-3-479-7519 (admin) > > ORCID 0000-0002-4972-7302 > > _______________________________ > > Who will prefer the jingle of jade pendants If they once have heard stone growing in a cliff? > > - Lao Tzu > > _______________________________________________ > > MSA-talk mailing list -- msa-talk@minlists.org To unsubscribe send an email to msa-talk-leave@minlists.org > > _______________________________________________ > > MSA-talk mailing list -- msa-talk@minlists.org > > To unsubscribe send an email to msa-talk-leave@minlists.org > > > _______________________________________________ > MSA-talk mailing list -- msa-talk@minlists.org > To unsubscribe send an email to msa-talk-leave@minlists.org > > > -- > Fred Marton, PhD > Department of Physical Sciences > Bergen Community College > 400 Paramus Rd. > Paramus, NJ 07652-1508 > +1-201-493-7518 > _______________________________________________ > MSA-talk mailing list -- msa-talk@minlists.org > To unsubscribe send an email to msa-talk-leave@minlists.org _______________________________________________ MSA-talk mailing list -- msa-talk@minlists.org To unsubscribe send an email to msa-talk-leave@minlists.org

Thanks Sebastien for suggesting water ice... Here is an amazing albeit older video by French pioneer Rene Le Toullec https://www.canal-u.tv/video/science_en_cours/cristallisation_sous_pression.11 On Wed, Feb 24, 2021 at 8:11 AM Robert Bodnar via MSA-talk < msa-talk@minlists.org> wrote: > I do recall seeing videos of this several years ago - maybe from > I-Ming Chou’s group or from Russ Hemley’s group? > > > > On Feb 24, 2021, at 10:47 AM, Fred Marton via MSA-talk < > msa-talk@minlists.org> wrote: > > > > A video of this would be great! > > > > On Wed, Feb 24, 2021 at 10:26 AM Sébastien Merkel via MSA-talk < > msa-talk@minlists.org> wrote: > > > > Not everyone has one, but pure water in the diamond anvil cell works > > well. You can look into your diamond cell with a microscope and camera > > and project the image. > > > > As you increase pressure to ~1 GPa, you form ice VI at ambient > > temperature, which you can melt by releasing pressure. > > > > > > -- > > Sébastien Merkel > > > > UMET - Unité Matériaux et Transformations > > Université de Lille - CNRS > > http://merkel.texture.rocks/ > > Tel: +33 (0)3 20 43 65 16 > > E-mail: sebastien.merkel@univ-lille.fr > > > > Le 23/02/2021 à 21:51, Mark Rivers via MSA-talk a écrit : > > > Hi Mike, > > > > > > I have never tried it, but gallium seems like a good candidate but for > the opposite effect. The liquid is more dense than the solid, so it melts > as you apply pressure. It melts at 29.8 C (85.6 F) so with just a little > heating you can get it near its melting point in the lab. Application of a > little pressure should melt it. It might be hard to observe in a vise, > since as soon as pressure is released (i.e. a droplet) it will freeze. > > > > > > Mark > > > > > > > > > -----Original Message----- > > > From: Mike Palin via MSA-talk <msa-talk@minlists.org> > > > Sent: Tuesday, February 23, 2021 2:14 PM > > > To: msa-talk@minlists.org > > > Subject: [MSA-talk] Classroom demonstration of decompression melting? > > > > > > Hello all- > > > > > > Does anyone know of a demonstration of decompression melting that > could be done "live" in a classroom? Ideally a nontoxic material that is > solid under compression (perhaps held in a vise) at near room temperatures > and visibly melts a bit when the pressure is released. I know, too much to > ask for. > > > > > > Cheers, > > > Mike > > > > > > ___________________________________________________ > > > Dr J. Michael Palin > > > Department of Geology > > > University of Otago > > > PO Box 56, Dunedin 9054 (post) > > > 360 Leith Street, North Dunedin 9016 (courier) New Zealand > > > +64-3-479-9083 (office) > > > +64-3-479-7527 (fax) > > > +64-3-479-7519 (admin) > > > ORCID 0000-0002-4972-7302 > > > _______________________________ > > > Who will prefer the jingle of jade pendants If they once have heard > stone growing in a cliff? > > > - Lao Tzu > > > _______________________________________________ > > > MSA-talk mailing list -- msa-talk@minlists.org To unsubscribe send an > email to msa-talk-leave@minlists.org > > > _______________________________________________ > > > MSA-talk mailing list -- msa-talk@minlists.org > > > To unsubscribe send an email to msa-talk-leave@minlists.org > > > > > _______________________________________________ > > MSA-talk mailing list -- msa-talk@minlists.org > > To unsubscribe send an email to msa-talk-leave@minlists.org > > > > > > -- > > Fred Marton, PhD > > Department of Physical Sciences > > Bergen Community College > > 400 Paramus Rd. > > Paramus, NJ 07652-1508 > > +1-201-493-7518 > > _______________________________________________ > > MSA-talk mailing list -- msa-talk@minlists.org > > To unsubscribe send an email to msa-talk-leave@minlists.org > _______________________________________________ > MSA-talk mailing list -- msa-talk@minlists.org > To unsubscribe send an email to msa-talk-leave@minlists.org >

Dear all, Also not decompression melting (the slope of the phase transitions are inverted), but I tend to use the analogy of what happens when you put carbonated beverages in the freezer, and they only freeze only after you open the container. Most people have experienced something like this. Cheers, Hector ------------------------------------------------------------- Dr. Hector M. Lamadrid Assistant Professor Department of Geological Sciences Office 202 University of Missouri Phone: +1-573-639-1804 Geological Building, Columbia, MO 65201, USA ________________________________ From: Marius Millot via MSA-talk <msa-talk@minlists.org> Sent: Thursday, February 25, 2021 2:01 AM To: Robert Bodnar <rjb@vt.edu> Cc: Sébastien Merkel <sebastien.merkel@univ-lille.fr>; msa-talk <msa-talk@minlists.org> Subject: [MSA-talk] Re: [EXT] Re: Classroom demonstration of decompression melting? WARNING: This message has originated from an External Source. This may be a phishing expedition that can result in unauthorized access to our IT System. Please use proper judgment and caution when opening attachments, clicking links, or responding to this email. Thanks Sebastien for suggesting water ice... Here is an amazing albeit older video by French pioneer Rene Le Toullec https://www.canal-u.tv/video/science_en_cours/cristallisation_sous_pression.11<https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.canal-u.tv%2Fvideo%2Fscience_en_cours%2Fcristallisation_sous_pression.11&data=04%7C01%7C%7C156567ce2fcd4adad7b108d8d9b0b0a2%7Ce3fefdbef7e9401ba51a355e01b05a89%7C0%7C0%7C637498700188683703%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=6QB6D1hWgT8yiy4zB02B9GxZG0AXt5Ms0R4AyE2JqTg%3D&reserved=0> On Wed, Feb 24, 2021 at 8:11 AM Robert Bodnar via MSA-talk <msa-talk@minlists.org<mailto:msa-talk@minlists.org>> wrote: I do recall seeing videos of this several years ago - maybe from I-Ming Chou’s group or from Russ Hemley’s group? > On Feb 24, 2021, at 10:47 AM, Fred Marton via MSA-talk <msa-talk@minlists.org<mailto:msa-talk@minlists.org>> wrote: > > A video of this would be great! > > On Wed, Feb 24, 2021 at 10:26 AM Sébastien Merkel via MSA-talk <msa-talk@minlists.org<mailto:msa-talk@minlists.org>> wrote: > > Not everyone has one, but pure water in the diamond anvil cell works > well. You can look into your diamond cell with a microscope and camera > and project the image. > > As you increase pressure to ~1 GPa, you form ice VI at ambient > temperature, which you can melt by releasing pressure. > > > -- > Sébastien Merkel > > UMET - Unité Matériaux et Transformations > Université de Lille - CNRS > http://merkel.texture.rocks/<https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmerkel.texture.rocks%2F&data=04%7C01%7C%7C156567ce2fcd4adad7b108d8d9b0b0a2%7Ce3fefdbef7e9401ba51a355e01b05a89%7C0%7C0%7C637498700188683703%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=%2FoV%2BJCSrv562ITqxTFEUwlcPt2ujXrQvfsCxBr1Lb3k%3D&reserved=0> > Tel: +33 (0)3 20 43 65 16 > E-mail: sebastien.merkel@univ-lille.fr<mailto:sebastien.merkel@univ-lille.fr> > > Le 23/02/2021 à 21:51, Mark Rivers via MSA-talk a écrit : > > Hi Mike, > > > > I have never tried it, but gallium seems like a good candidate but for the opposite effect. The liquid is more dense than the solid, so it melts as you apply pressure. It melts at 29.8 C (85.6 F) so with just a little heating you can get it near its melting point in the lab. Application of a little pressure should melt it. It might be hard to observe in a vise, since as soon as pressure is released (i.e. a droplet) it will freeze. > > > > Mark > > > > > > -----Original Message----- > > From: Mike Palin via MSA-talk <msa-talk@minlists.org<mailto:msa-talk@minlists.org>> > > Sent: Tuesday, February 23, 2021 2:14 PM > > To: msa-talk@minlists.org<mailto:msa-talk@minlists.org> > > Subject: [MSA-talk] Classroom demonstration of decompression melting? > > > > Hello all- > > > > Does anyone know of a demonstration of decompression melting that could be done "live" in a classroom? Ideally a nontoxic material that is solid under compression (perhaps held in a vise) at near room temperatures and visibly melts a bit when the pressure is released. I know, too much to ask for. > > > > Cheers, > > Mike > > > > ___________________________________________________ > > Dr J. Michael Palin > > Department of Geology > > University of Otago > > PO Box 56, Dunedin 9054 (post) > > 360 Leith Street, North Dunedin 9016 (courier) New Zealand > > +64-3-479-9083 (office) > > +64-3-479-7527 (fax) > > +64-3-479-7519 (admin) > > ORCID 0000-0002-4972-7302 > > _______________________________ > > Who will prefer the jingle of jade pendants If they once have heard stone growing in a cliff? > > - Lao Tzu > > _______________________________________________ > > MSA-talk mailing list -- msa-talk@minlists.org<mailto:msa-talk@minlists.org> To unsubscribe send an email to msa-talk-leave@minlists.org<mailto:msa-talk-leave@minlists.org> > > _______________________________________________ > > MSA-talk mailing list -- msa-talk@minlists.org<mailto:msa-talk@minlists.org> > > To unsubscribe send an email to msa-talk-leave@minlists.org<mailto:msa-talk-leave@minlists.org> > > > _______________________________________________ > MSA-talk mailing list -- msa-talk@minlists.org<mailto:msa-talk@minlists.org> > To unsubscribe send an email to msa-talk-leave@minlists.org<mailto:msa-talk-leave@minlists.org> > > > -- > Fred Marton, PhD > Department of Physical Sciences > Bergen Community College > 400 Paramus Rd. > Paramus, NJ 07652-1508 > +1-201-493-7518 > _______________________________________________ > MSA-talk mailing list -- msa-talk@minlists.org<mailto:msa-talk@minlists.org> > To unsubscribe send an email to msa-talk-leave@minlists.org<mailto:msa-talk-leave@minlists.org> _______________________________________________ MSA-talk mailing list -- msa-talk@minlists.org<mailto:msa-talk@minlists.org> To unsubscribe send an email to msa-talk-leave@minlists.org<mailto:msa-talk-leave@minlists.org>