Dear Colleagues, We would like to encourage your submission and attendance to our session celebrating the career of Prof. Peter J. Heaney. The GSA Connects 2025 conference is being held in San Antonio from October 19-22, 2025. The abstract submission portal is https://gsameetings.secure-platform.com/connects25 and abstracts are due by August 5, 2025. T123. Minerals in Motion: Tracking Mineral Reactions Using In Situ and Synchrotron Techniques, A Celebration of the Career of Peter Heaney. Session Description: In celebration of the career of Dr. Peter Heaney, we invite submissions using in situ, synchrotron, X-ray, neutron, or electron techniques to study rates/mechanisms of mineral reactions, alongside contributions exploring new approaches to mineralogy education. Invited Speakers: Peter Heaney, Pennsylvania State University Jeffrey Post, Smithsonian Institution Session Sponsors: Mineralogical Society of America (MSA), Mineralogy, Geochemistry, Petrology & Volcanology Division (MGPV), Soils and Soil Processes Division (SSPD), Geochemical Society (GS) We hope to see you in San Antonio! Sincerely, Florence T. Ling (ling@lasalle.edu), La Salle University Si Athena Chen (chens1@ornl.gov<mailto:chens1@ornl.gov>), Oak Ridge National Laboratory Daniel Hummer (daniel.hummer@siu.edu<mailto:daniel.hummer@siu.edu>), Southern Illinois University Hongwu Xu (Hongwu.Xu@asu.edu), Arizona State University Joanne Stubbs (stubbs@cars.uchicago.edu), University of Chicago [cid:image001.png@01DBF704.B3B89570] ---------------------------------------------- Si Athena Chen, Ph.D. Neutron Diffraction Instrument Scientist HB-2C WAND² https://neutrons.ornl.gov/wand Oak Ridge National Laboratory High Flux Isotope Reactor (HFIR) Neutron Scattering Division 1 Bethel Valley Road, Bldg. 7962, Rm. 217 Oak Ridge, TN 37831-6393 814-777-4374 | chens1@ornl.gov<mailto:chens1@ornl.gov>