Synchrotron X-ray diffraction study of phenacite at high pressure

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 i...

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Bibliographic Details
Published inChinese physics C Vol. 36; no. 2; pp. 179 - 183
Main Author 范大伟 马麦宁 魏舒怡 陈志强 谢鸿森
Format Journal Article
LanguageEnglish
Published United States 01.02.2012
Subjects
Compressibility
Diamond anvil cells
Diffraction
Equations of state
Light sources
Phase change
Synchrotrons
X-rays
X-射线衍射
压力范围
同步辐射X射线衍射
同步辐射光源
国家实验室
等温状态方程
角度色散
高压
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Summary: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 V0, K0, and K0 refined with a third-order Birch-Murnaghan equation of state are V0=1116.1：E1.2 -3 K0=2234-9 GPa, and K=5.54-0.8. rthermore, we confirm that the linear compressibilities （/3） along a and c directions of phenacite are elastically isotropic （a=1.50x10-3 and /3c=1.34x10-3 CPa-1）. Consequently, it can be concluded that the compressibility of phenacite under high pressures has been accurately constrained.
Bibliography:11-5641/O4
X-ray diffraction, high pressure, equation of state, phenacite
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 V0, K0, and K0 refined with a third-order Birch-Murnaghan equation of state are V0=1116.1：E1.2 -3 K0=2234-9 GPa, and K=5.54-0.8. rthermore, we confirm that the linear compressibilities （/3） along a and c directions of phenacite are elastically isotropic （a=1.50x10-3 and /3c=1.34x10-3 CPa-1）. Consequently, it can be concluded that the compressibility of phenacite under high pressures has been accurately constrained.
FAN Da-Wei MA Mai-Ning WEI Shu-Yi CHEN Zhi-Qiang XIE Hong-Sen 1 Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 2 Key Laboratory of Computational Geodynamics, Chinese Academy of Sciences, Beijing 100049, China 3 Graduate University of Chinese Academy of Sciences, Beijing 100049, China 4 Department of Geoscience, Stony Brook University, New York 11794, USA
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
BNL-100564-2013-JA
DE-AC02-98CH10886
USDOE SC OFFICE OF SCIENCE (SC)
ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/36/2/014