典型文献
Equations of state of iron and nickel to the pressure at the center of the Earth
文献摘要：
Synchrotron radiation x-ray diffraction investigations of iron(Fe)and nickel(Ni)are conducted at pressures up to 354 and 368 GPa,respectively,and the equations of state(EOSs)at 298 K for the two elements are obtained for data extending to pressures as high as those at the center of the Earth,using the latest Pt-EOS pressure scale.From a least-squares fit to the Vinet equation using the observed pressure-volume data,the isothermal bulk modulus K0 and its pressure derivative K'0 are estimated to be 159.27(99)GPa and 5.86(4)for hcp-Fe,and 173.5(1.4)GPa and 5.55(5)for Ni.By comparing the present EOSs and extrapolated EOSs reported in the literature for Fe and Ni,the volumes of Fe and Ni at 365 GPa are found to be 2.3％and 1.5％larger than those estimated from extrapolated EOSs in previous studies,respectively.It is concluded that these discrepancies are due to the pressure scale.The present results suggest that the densities of Fe and Ni at a pressure of365 GPa corresponding to the center of the Earth are 2.3％and 1.5％,respectively,lower than previously thought.
文献关键词：
中图分类号：
作者姓名：
Naohisa Hirao;Yuichi Akahama;Yasuo Ohishi
作者机构：
Japan Synchrotron Radiation Research Institute(JASRI),Sayo,Sayo-gun,Hyogo 679-5198,Japan;Graduate School of Material Science,University of Hyogo,Kouto,Kamigohri,Hyogo 678-1297,Japan
文献出处：
引用格式：
[1]Naohisa Hirao;Yuichi Akahama;Yasuo Ohishi-.Equations of state of iron and nickel to the pressure at the center of the Earth)[J].极端条件下的物质与辐射（英文）,2022(03):54-61
A类：
Vinet,of365
B类：
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AB值：
0.453448
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