urn:nasa:pds:context:investigation:individual.xas_synthesized_glasses 2.2 1.22.0.0 Product_Context 2026-07-07 2.2 Removed duplicate Internal_Reference entries from Reference_List. 2024-10-22 2.1 Updates to title and name to support EdWG scrub efforts 2022-08-22 2.0 Major changes per PDS Editorial Working Group efforts 2021-08-18 1.0 Initial version urn:nasa:pds:context:facility:laboratory.aps investigation_to_facility urn:nasa:pds:context:instrument:aps.beamline13ide investigation_to_instrument urn:nasa:pds:xas_synthesized_glasses:document:xas_synthesized_glasses_description investigation_to_document 10.2138/am-2016-5555 M. Darby Dyar, Molly McCanta, Elly Breves, C.J. Carey, Antonio Lanzirotti, Accurate predictions of iron redox state in silicate glasses: A multivariate approach using X-ray absorption spectroscopy, American Mineralogist, 101(3): 744–747, doi: https://doi.org/10.2138/am-2016-5555. XAS Spectra of Synthesized Glasses Individual Investigation 2018-02-10 2019-02-16 Multivariate techniques were used to enable accurate XAS measurements of Fe, Cr, Mn, and Ti ratios across the whole spectral region through creation of a broad suite of experimentally homogenized glasses of geological relevance for use as XAS standards. Iron, Cr, Mn, and Ti were analyzed as epoxy-mounted polished glass beads using XAS at the GeoSoilEnviroCARS beamline at the Advanced Photon Source, Argonne National Laboratory using a spot size of ca. 1x1 μm.