Synchrotron X-ray diffraction study of phenacite at high pressure

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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
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 shu
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Received: 2011-04-26
Revised: 2011-06-08
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Synchrotron X-ray diffraction study of phenacite at high pressure

    Corresponding author: FAN Da-Wei,
    Corresponding author: MA Mai-Ning,

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 V0, K0, and K0′ refined with a third-order Birch-Murnaghan equation of state are V0=1116.1±1.2 Å3, K0=223±9 GPa, and K0′=5.5±0.8. Furthermore, we confirm that the linear compressibilities (β) along a and c directions of phenacite are elastically isotropic (βa=1.50×10-3 and βc=1.34×10-3 GPa-1). Consequently, it can be concluded that the compressibility of phenacite under high pressures has been accurately constrained.

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