Chinese Physics C > 2012, Vol. 36 > Issue(2): 179-183 DOI: 10.1088/1674-1137/36/2/014

Synchrotron X-ray diffraction study of phenacite at high pressure

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Abstract：
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 Å ³, K ₀=223±9 GPa, and K ₀′=5.5±0.8. Furthermore, we confirm that the linear compressibilities ( β) along aand cdirections of phenacite are elastically isotropic ( β _a=1.50×10 ^-3and β _c=1.34×10 ^-3GPa ^-1). Consequently, it can be concluded that the compressibility of phenacite under high pressures has been accurately constrained.

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FAN Da-Wei, MA Mai-Ning, WEI Shu-Yi, CHEN Zhi-Qiang and XIE Hong-Sen. Synchrotron X-ray diffraction study of phenacite at high pressure[J]. Chinese Physics C, 2012, 36(2): 179-183. doi: 10.1088/1674-1137/36/2/014

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Received: 2011-04-26
Revised: 2011-06-08

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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Synchrotron X-ray diffraction study of phenacite at high pressure

Corresponding author:FAN Da-Wei,

Corresponding author:MA Mai-Ning,

Received Date:2011-04-26

Accepted Date:2011-06-08

Available Online:2012-02-05

Abstract: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 ofV₀,K₀, andK₀′ refined with a third-order Birch-Murnaghan equation of state areV₀=1116.1±1.2 Å³,K₀=223±9 GPa, andK₀′=5.5±0.8. Furthermore, we confirm that the linear compressibilities (β) alongaandcdirections of phenacite are elastically isotropic (β_a=1.50×10^-3andβ_c=1.34×10^-3GPa^-1). Consequently, it can be concluded that the compressibility of phenacite under high pressures has been accurately constrained.

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Synchrotron X-ray diffraction study of phenacite at high pressure

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