Инд. авторы:	Sakairi T., Sakamaki T., Ohtani E., Fukui H., Kamada S., Tsutsui S., Uchiyama H., Baron A.Q.R.
Заглавие:	Sound velocity measurements of hcp Fe-Si alloy at high pressure and high temperature by inelastic X-ray scattering
Библ. ссылка:	Sakairi T., Sakamaki T., Ohtani E., Fukui H., Kamada S., Tsutsui S., Uchiyama H., Baron A.Q.R. Sound velocity measurements of hcp Fe-Si alloy at high pressure and high temperature by inelastic X-ray scattering // American Mineralogist. - 2018. - Vol.103. - Iss. 1. - P.85-90. - ISSN 0003-004X. - EISSN 1945-3027.
Идентиф-ры:	DOI: 10.2138/am-2018-6072; РИНЦ: 35486725; SCOPUS: 2-s2.0-85040358618; WoS: 000426312800008;
Реферат:	eng: The sound velocity of hcp Fe0.89Si0.11 (Fe-6wt% Si) alloy was measured at pressures from 45 to 84 GPa and temperatures of 300 and 1800 K using inelastic X-ray scattering (IXS) from laser-heated samples in diamond-anvil cells (DACs). The compressional velocity (v(P)) and density (rho) of the Fe-Si alloy are observed to follow a linear relationship at a given temperature. For hcp Fe0.89Si0.11 alloy we found v(P) = 1.030 (+/- 0.008) x rho - 1.45 (+/- 0.08) + [3.8 x 10(-5)(T - 300) x(rho - 15.37)], including non-negligible temperature dependence. The present results of sound velocity and density of hcp Fe0.89Si0.11 alloy indicates that 3 similar to 6 wt% of silicon in the inner core with additional amount of Ni can explain the compressional velocity (vP) and density (r) of the "preliminary Earth reference model" (PREM), assuming a temperature of 5500 K and that silicon is the only light element in the inner core
Ключевые слова:	inner core; Birch's law; EARTHS INNER-CORE; NI; STATE; IRON; ELASTIC PROPERTIES; silicon; high temperature; high pressure; Fe-Si alloy; Sound velocity; inelastic X-ray scattering;
Издано:	2018
Физ. хар-ка:	с.85-90
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