Synchrotron X-ray diffraction study of phenacite at high pressure

FAN Da-Wei; MA Mai-Ning; WEI Shu-Yi; CHEN Zhi-Qiang; XIE Hong-Sen

doi:10.1088/1674-1137/36/2/014

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 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 (β_a=1.50×10^-3 and β_c=1.34×10^-3 GPa^-1). Consequently, it can be concluded that the compressibility of phenacite under high pressures has been accurately constrained.

References

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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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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 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 (β_a=1.50×10^-3 and β_c=1.34×10^-3 GPa^-1). Consequently, it can be concluded that the compressibility of phenacite under high pressures has been accurately constrained.