The equation of state of CsCl-structured FeSi to 40 GPa: Implications for silicon in the Earth's core

被引：37

作者：

Dobson, DP

Crichton, WA

Bouvier, P

Vocadlo, L

Wood, IG

机构：

[1] UCL, Dept Earth Sci, London WC1E 6BT, England

[2] Univ Bayreuth, Bayer Geoinst, D-8580 Bayreuth, Germany

[3] European Synchrotron Res Facil, Grenoble, France

来源：

GEOPHYSICAL RESEARCH LETTERS | 2003年 / 30卷 / 01期

关键词：

D O I：

10.1029/2002GL016228

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We have measured the compressibility of CsCl-structured FeSi to 40 GPa by X-ray powder diffraction using synchrotron radiation. A third order Birch-Murnaghan equation of state fit to the experimental data yields V-0=21.74+/-0.02 Angstrom, with a K-0 of 184+/-5 GPa and K'(0)=4.2+/-0.3. The measured density and elastic properties of CsCl-FeSi are consistent with silicon being a major element in the Earth's core.

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页数：4

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