TY - JOUR
T1 - Equation of state of Fe3S at room temperature up to 2megabars
AU - Kamada, Seiji
AU - Ohtani, Eiji
AU - Terasaki, Hidenori
AU - Sakai, Takeshi
AU - Takahashi, Suguru
AU - Hirao, Naohisa
AU - Ohishi, Yasuo
N1 - Funding Information:
The authors thank Dr. Przemyslaw Dera and Prof. Jay Bass for fruitful discussions. S.K. gratefully acknowledges the Japan Society for the Promotion of Science (JSPS) for providing a research fellowship. This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Science, Sport and Technology of the Japanese Government (Nos 18104009 and 22000002 ) to E.O., and a Grant-in-Aid for Young Scientists (B) (No. 21740374) to T.S. This work was conducted as part of the Global Center of Excellence program “Global Education and Research Center for Earth and Planetary Dynamics”. The experiments were conducted under contract at SPruing-8 (proposal numbers 2007A1731, 2007A2090, 2007B1476, 2008A1144, 2008A1601, 2008B1582, 2008B1625, 2009A1463, 2009A1570, 2009B0028, 2010A0028, 2010B0028, and 2011A0028). The authors thank Prof. Tomoo Katsura, the managing editor, and anonymous reviewers for improving the manuscript.
PY - 2014/3
Y1 - 2014/3
N2 - The equation of state of Fe3S was investigated up to 200GPa at room temperature using a diamond anvil cell. Fe3S adopts a tetragonal structure up to 200GPa and no phase transition was observed. The fourth-order Birch-Murnaghan equation of state (EOS) was fitted to present compression data at room temperature. The elastic parameters, such as bulk modulus (K0), its pressure derivative (K0'), and K0″(dK'/dP) were determined to be 122.4(50)GPa, 5.36(48), and -0.066(30)GPa-1, respectively by fixing the zero pressure volume, V0, to be 377Å3. Based on fourth-order Birch-Murnaghan EOS of Fe3S, the maximum amount of S in the inner core was estimated to be 11.4(14)at.% based on the density deficit of the inner core.
AB - The equation of state of Fe3S was investigated up to 200GPa at room temperature using a diamond anvil cell. Fe3S adopts a tetragonal structure up to 200GPa and no phase transition was observed. The fourth-order Birch-Murnaghan equation of state (EOS) was fitted to present compression data at room temperature. The elastic parameters, such as bulk modulus (K0), its pressure derivative (K0'), and K0″(dK'/dP) were determined to be 122.4(50)GPa, 5.36(48), and -0.066(30)GPa-1, respectively by fixing the zero pressure volume, V0, to be 377Å3. Based on fourth-order Birch-Murnaghan EOS of Fe3S, the maximum amount of S in the inner core was estimated to be 11.4(14)at.% based on the density deficit of the inner core.
KW - Birch-Murnaghan equation of state
KW - Diamond anvil cell
KW - In situ X-ray diffraction
KW - Inner core
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U2 - 10.1016/j.pepi.2013.11.001
DO - 10.1016/j.pepi.2013.11.001
M3 - Article
AN - SCOPUS:84897066176
SN - 0031-9201
VL - 228
SP - 106
EP - 113
JO - Physics of the Earth and Planetary Interiors
JF - Physics of the Earth and Planetary Interiors
ER -