Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences
2016 Annual Meeting of Japan Association of Mineralogical Sciences
Session ID : R5-07
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Host: Japan Association of Mineralogical Sciences

R5: Extraterrestrial materials
Oxidation states of Fe in olivine from two pallasites
*Terumi Ejima, Yoshiaki Kon, Takaomi Yokoama, Masahide Akasaka, Takafumi Hirata
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Keywords: Olivine, Pallasite, Mössbauer methods, Brahin, Quijingue
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Abstract
Oxidation states of Fe in olivine from two pallasites were determined using Mössbauer spectroscopy.  The Fo contents of olivine from Quijingue and Brahin were 87 and 89 mol%, respectively. The carefully separated olivine samples were subsidized to the analysis of oxidation states. To evaluate possible contamination of Fe, both XRD and the morphological observation using FE-EPMA were made. Our experiments demonstrated the presence of ferric iron in two olivine samples analyzed in this study.
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© 2016 Japan Association of Mineralogical Sciences
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