Equation of State of Liquid Iron under Extreme Conditions

被引：80

作者：

Kuwayama, Yasuhiro ^{[1
,2
]}

Morard, Guillaume ^{[3
,4
]}

Nakajima, Yoichi ^{[5
,6
]}

Hirose, Kei ^{[1
,7
]}

Baron, Alfred Q. R. ^{[6
]}

Kawaguchi, Saori, I ^{[8
]}

Tsuchiya, Taku ^{[2
]}

Ishikawa, Daisuke ^{[6
,8
]}

Hirao, Naohisa ^{[8
]}

Ohishi, Yasuo ^{[8
]}

机构：

[1] Univ Tokyo, Dept Earth & Planetary Sci, Tokyo 1130033, Japan

[2] Ehime Univ, Geodynam Res Ctr, Matsuyama, Ehime 7908577, Japan

[3] Sorbonne Univ, CNRS, Museum Natl Hist Nat, UMR,IMPMC, F-7590 Paris, France

[4] Univ Grenoble Alpes, Univ Savoie Mt Blanc, CNRS, IRD,IFSSTAR,ISTerre, F-38000 Grenoble, France

[5] Kumamoto Univ, Dept Phys, Kumamoto 8608555, Japan

[6] RIKEN SPring 8 Ctr, Mat Dynam Lab, Sayo, Hyogo 6795148, Japan

[7] Earth Life Sci Inst, Tokyo Inst Technol, Tokyo 1528550, Japan

[8] Japan Synchrotron Radiat Res Inst, SPring 8, Sayo, Hyogo 6795198, Japan

来源：

PHYSICAL REVIEW LETTERS | 2020年 / 124卷 / 16期

关键词：

DENSITY-MEASUREMENTS; CORE CONDITIONS; SOUND-VELOCITY; HIGH-PRESSURES; EARTHS; TEMPERATURE; FE; RESISTIVITY; METALS;

D O I：

10.1103/PhysRevLett.124.165701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The density of liquid iron has been determined up to 116 GPa and 4350 K via static compression experiments following an innovative analysis of diffuse scattering from liquid. The longitudinal sound velocity was also obtained to 45 GPa and 2700 K based on inelastic x-ray scattering measurements. Combining these results with previous shock-wave data, we determine a thermal equation of state for liquid iron. It indicates that Earth's outer core exhibits 7.5%-7.6% density deficit, 3.7%-4.4% velocity excess, and an almost identical adiabatic bulk modulus, with respect to liquid iron.

引用

页数：6

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