Synchrotron X-ray diffraction study of phenacite at high pressure

被引：2

作者：

Fan Da-Wei ^{[1
]}

Ma Mai-Ning ^{[2
,3
]}

Wei Shu-Yi ^{[1
,3
]}

Chen Zhi-Qiang ^{[4
]}

Xie Hong-Sen ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Geochem, Guiyang 550002, Peoples R China

[2] Chinese Acad Sci, Key Lab Computat Geodynam, Beijing 100049, Peoples R China

[3] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

[4] SUNY Stony Brook, Dept Geosci, Stony Brook, NY 11794 USA

来源：

CHINESE PHYSICS C | 2012年 / 36卷 / 02期

基金：

中国国家自然科学基金;

关键词：

X-ray diffraction; high pressure; equation of state; phenacite; CRYSTAL-CHEMISTRY; PHENAKITE BE2SIO4; EQUATIONS; STATE;

D O I：

10.1088/1674-1137/36/2/014

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We report the results of a natural phenacite from 0 to 30.9 GPa using in situ angle-dispersive X-ray diffraction and a diamond anvil cell at the National Synchrotron Light Source, Brookhaven National Laboratory. Over this pressure range, no phase change or disproportionation has been observed. The isothermal equation of state was determined. The values of V-0, K-0, and K-0' refined with a third-order Birch-Murnaghan equation of state are V-0=1116.1 +/- 1.2 angstrom(3), K-0=223 +/- 9 GPa, and K-0 '=5.5 +/- 0.8. Furthermore, we confirm that the linear compressibilities (beta) along a and c directions of phenacite are elastically isotropic (beta(a)=1.50 x 10(-3) and beta(c)=1.34 x 10(-3) GPa(-1)). Consequently, it can be concluded that the compressibility of phenacite under high pressures has been accurately constrained.

引用

页码：179 / 183

页数：5

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