Synchrotron X-ray diffraction study of phenacite at high pressure  

作　　者：FAN Da-Wei MA Mai-Ning WEI Shu-Yi CHEN Zhi-Qiang XIE Hong-sen 范大伟;马麦宁;魏舒怡;陈志强;谢鸿森(Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002,China;Key Laboratory of Computational Geodynamics,Chinese Academy of Sciences,Beijing 100049,China;Graduate University of Chinese Academy of Sciences,Beijing 100049,China;Department of Geoscience,Stony Brook University,New York 11794,USA)

机构地区：[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

出　　处：《Chinese Physics C》2012年第2期179-183,共5页中国物理C（英文版）

基　　金：Supported by Mutual Foundation of Large Scientific Facilities of National Natural Science Foundation of China, Chinese Academy of Sciences (10979053);National Natural Science Foundation of China (41004035, 90914008);Knowledge Innovation Project of Chinese Academy of Sciences (KZCX2-EW-QN602);COMPRES, Consortium for Materials Properties Research in Earth Sciences under NSF Cooperative Agreement EAR 06-49658;supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences (DEAC02-98CH10886)

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 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.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.

关 键 词：X-ray diffraction high pressure equation of state phenacite 

分 类 号：O434.1[机械工程—光学工程]