Synthesis of Xenon and Iron-Nickel Intermetallic Compounds at Earth's Core Thermodynamic Conditions

被引：38

作者：

Stavrou, Elissaios ^{[1
]}

Yao, Yansun ^{[2
,3
]}

Goncharov, Alexander F. ^{[4
,5
,6
,7
]}

Lobanov, Sergey S. ^{[6
,8
]}

Zaug, Joseph M. ^{[1
]}

Liu, Hanyu ^{[6
]}

Greenberg, Eran ^{[9
]}

Prakapenka, Vitali B. ^{[9
]}

机构：

[1] Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, Livermore, CA 94550 USA

[2] Univ Saskatchewan, Dept Phys & Engn Phys, Saskatoon, SK S7N 5E2, Canada

[3] Canadian Light Source, Saskatoon, SK S7N 2V3, Canada

[4] Chinese Acad Sci, Key Lab Mat Phys, Hefei 230031, Anhui, Peoples R China

[5] Chinese Acad Sci, Ctr Energy Matter Extreme Environm, Hefei 230031, Anhui, Peoples R China

[6] Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA

[7] Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China

[8] Russian Acad Sci, Sobolev Inst Geol & Mineral, Siberian Branch, Novosibirsk 630090, Russia

[9] Univ Chicago, Ctr Adv Radiat Sources, Chicago, IL 60637 USA

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 120卷 / 09期

基金：

加拿大自然科学与工程研究理事会; 中国国家自然科学基金;

关键词：

HIGH-PRESSURE; CRYSTAL-STRUCTURES; ORIGIN; 1ST-PRINCIPLES; GEOCHEMISTRY; STABILITY; PROGRAM; SODIUM; ALLOY;

D O I：

10.1103/PhysRevLett.120.096001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using in situ synchrotron x-ray diffraction and Raman spectroscopy in concert with first principles calculations we demonstrate the synthesis of stable Xe(Fe; Fe/Ni)(3) and XeNi3 compounds at thermodynamic conditions representative of Earth's core. Surprisingly, in the case of both the Xe-Fe and Xe-Ni systems Fe and Ni become highly electronegative and can act as oxidants. The results indicate the changing chemical properties of elements under extreme conditions by documenting that electropositive at ambient pressure elements could gain electrons and form anions.

引用

页数：6

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