An in situ high-pressure X-ray diffraction experiment on hydroxyapophyllite  

作　　者：范大伟 魏舒怡 谢鸿森 

机构地区：[1]Institute of Geochemistry of Laboratory for High Temperature & High Pressure Study of the Earth's Interior, Chinese Academy of Sciences

出　　处：《Chinese Physics B》2013年第1期167-170,共4页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos. 41004035 and 90914008);the Western Doctor Special Fund of the West Light Foundation of the Chinese Academy of Sciences;the Research Start-up Funds of the Excellent Doctoral Dissertation and Dean Award of Chinese Academy of Sciences;The High Pressure Station is supported by Chinese Academy of Sciences (Grant Nos. KJCX2-SW-N20 and KJCX2-SW-N03)

摘　　要：The compression behavior of a natural hydroxyapophyllite is investigated up to about 10.01 GPa at 300 K using in situ angle-dispersive X-ray diffraction and a diamond anvil cell at the High Pressure Experiment Station, Beijing Synchrotron Radiation Facility （BSRF）. Over this pressure range, no phase change or disproportionation is observed. The isothermal equation of state is determined for the first time. The values of zero-pressure volume V0, isothermal bulk modulus K0, and K0＇ refined with a third-order Birch-Mumaghan equation of state are V0 = 1276.3 ± 0.9 A3, K0 = 71± 3 GPa, and K0＇ = 8 ±1. Furthermore, we confirm that the values of linear compressibility β along the a and c directions of hydroxyapophyllite are elastically anisotropic.The compression behavior of a natural hydroxyapophyllite is investigated up to about 10.01 GPa at 300 K using in situ angle-dispersive X-ray diffraction and a diamond anvil cell at the High Pressure Experiment Station, Beijing Synchrotron Radiation Facility （BSRF）. Over this pressure range, no phase change or disproportionation is observed. The isothermal equation of state is determined for the first time. The values of zero-pressure volume V0, isothermal bulk modulus K0, and K0＇ refined with a third-order Birch-Mumaghan equation of state are V0 = 1276.3 ± 0.9 A3, K0 = 71± 3 GPa, and K0＇ = 8 ±1. Furthermore, we confirm that the values of linear compressibility β along the a and c directions of hydroxyapophyllite are elastically anisotropic.

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

分 类 号：O434.1[机械工程—光学工程]