Compressibility of a natural kyanite to 17.5 GPa  

作　　者：Xi Liu Sean R. Shieh Michael E. Fleet Lifei Zhang 

机构地区：[1]Key Laboratory of Orogenic Belts and Crustal Evolution, MOE, Peking University, Beijing 100871, China [2]School of Earth and Space Sciences, Peking University, Beijing 100871, China [3]Department of Earth Sciences, University of Western Ontario, London, Ont., Canada N6A 5B7

出　　处：《Progress in Natural Science:Materials International》2009年第10期1281-1286,共6页自然科学进展·国际材料（英文版）

基　　金：supported by the Natural Sciences and Engineering Research Council of Canada;by the National Natural Science Foundation of China (Grant Nos.40730314 and 40872033)

摘　　要：The compressional behaviour of a natural kyanite,（Al1.99Fe0.01）SiO5, has been investigated to about 17.5 GPa at 300 K using a diamond-anvil cell and synchrotron X-ray diffraction. The pressure-volume data fitted to the third-order Birch-Murnaghan equation of state （EoS） yield an isothermal bulk modulus （Koτ） of 192±6 GPa and pressure derivative （K^10τ） of 6±1. When Kor is fixed as 4, the derived Koτ is 201±2 GPa. These values are in excellent agreement with most experimental determinations in the literature. Consequently, it can be concluded that the compressibiliity of kyanite under high pressures has been accurately constrained.The compressional behaviour of a natural kyanite,(Al1.99Fe0.01)SiO5,has been investigated to about 17.5 GPa at 300 K using a diamond-anvil cell and synchrotron X-ray diffraction.The pressure-volume data fitted to the third-order Birch-Murnaghan equation of state(EoS) yield an isothermal bulk modulus(K0T) of 192 ± 6 GPa and pressure derivative(K00T) of 6 ± 1.When K00T is fixed as 4,the derived K0T is 201 ± 2 GPa.These values are in excellent agreement with most experimental determinations in the literature.Consequently,it can be concluded that the compressibility of kyanite under high pressures has been accurately constrained.

关 键 词：COMPRESSIBILITY High-pressure Isothermal bulk modulus KYANITE Synchrotron X-ray diffraction 

分 类 号：F812.45[经济管理—财政学] TD978.1[矿业工程—选矿]