High-pressure investigation on prehnite: X-ray diffraction and Raman spectroscopy

被引：1

作者：

Zhang, Qian ^{[1
]}

Qin, Fei ^{[2
,3
]}

Niu, Jingjing ^{[2
,3
]}

Wu, Xiang ^{[4
]}

机构：

[1] China Univ Geosci, Gemol Inst, Wuhan 430074, Hubei, Peoples R China

[2] Peking Univ, Minist Educ, Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China

[3] Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China

[4] China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Hubei, Peoples R China

来源：

HIGH TEMPERATURES-HIGH PRESSURES | 2018年 / 47卷 / 03期

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

Prehnite; High pressure; Structural stability; Equation of state; X-ray diffraction; Raman spectroscopy; EQUATION-OF-STATE; GPA; SPECTRA;

D O I：

暂无

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The compression behavior of a natural sample of prehnite has been investigated using in situ angle-dispersive X-ray diffraction (XRD) and Raman spectroscopy combined with diamond anvil cell up to 25 GPa at room temperature. The results from XRD show that prehnite is stable with orthorhombic phase up to highest pressure, but a change of the axial compressiblities occurs at about 12 GPa. The results from Raman spectroscopy demonstrate a discontinuity at about 11 GPa. Both experiments reveal a change of tetrahedral distortion at about 11-12 GPa. Parameters of isothermal equation of state of prehnite are V-0 = 477.6 +/- 1.7 angstrom(3), B-0 = 103.5 +/- 5.0 GPa. Axial compressibility of prehnite presents obvious anisotropy. The Gruneisen parameters of prehnite are obtained according to its bulk moduli and the behavior of nine observed Raman modes.

引用

页码：213 / 221

页数：9

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