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

作者：Fan Da Wei^*; Wei Shu Yi; Xie Hong Sen

来源：Chinese Physics B, 2013, 22(1): 010702.

DOI：10.1088/1674-1056/22/1/010702

• hydroxyapophyllite
• X-ray diffraction
• equation of state
• high pressure

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 V-0, isothermal bulk modulus K-0, and K-0' refined with a third-order Birch-Murnaghan equation of state are V-0 = 1276.3 +/- 0.9 angstrom(3), K-0 = 71 +/- 3 GPa, and K-0' = 8 +/- 1. Furthermore, we confirm that the values of linear compressibility beta along the a and c directions of hydroxyapophyllite are elastically anisotropic.

• 出版日期2013-1
• 单位中国科学院