Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences
2011 Joint Annual Meeting of Japan Association of Mineralogical Sciences and The Geological Society of Japan
Session ID : R3-11
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R3: High-pressure science and deep Earth's material
Phase stability and compression of (Fe,Ni)3S
*Takeshi Sakai, Eiji Ohtani, Hidenori Terasaki, Siji Kamada, Naohisa Hirao
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Keywords: Core, Fe-FeS system, phase relation, equation of state, laser-heated diamond-anvil cell
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Abstract
An in situ synchrotron powder X ray diffraction study on (Fe0.89,Ni0.11)3S was conducted up to 141 GPa and 1590 K. (Fe0.89,Ni0.11)3S has a tetragonal structure, which is the same structure as Ni-free Fe3S. Fitting a third-order Birch-Murnaghan equation of state to data at ambient temperature yielded a bulk modulus of K0 = 138.1(7.2) GPa and its pressure derivative K0' = 4.5(3) with a zero pressure volume V0 = 375.67(4) Å3.
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© 2011 Japan Association of Mineralogical Sciences
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Abstracts for Annual Meeting of the Mineralogical Society of Japan

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