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Compressional behavior of natural eclogitic zoisite by synchrotron X-ray single-crystal diffraction to 34 GPa
Jingui Xu; Dongzhou Zhang; Dawei Fan; Xiang Wu; Feng Shi; Wenge Zhou
2019
发表期刊Physics and Chemistry of Minerals
卷号46页码:333–341
摘要

Zoisite is a typical accessory mineral of eclogite; understanding its compressional behavior is important for the knowledge of the properties and processes within subduction zones. In this study, the compressional behavior of a natural eclogitic zoisite Ca1.99(Al2.87Fe0.11)Si3.00O12OH was investigated at ambient temperature and high pressure to 34 GPa, using a diamond anvil cell (DAC) combined with synchrotron-based single-crystal X-ray diffraction (XRD) method. Our results indicate that zoisite is stable over the experimental pressure range. The pressure–volume (PV) data were fitted to a third-order Birch–Murnaghan equation of state (BM3 EoS), and the equation of state coefficients including zero-pressure unit-cell volume (V0), isothermal bulk modulus (KT0), and its pressure derivative (K′T0KT0′) were obtained as: V0 = 904.77(8) Å3KT0 = 118(1) GPa, and K′T0KT0′ = 6.3(2), respectively. The axial compressibilities (β) for a-, b-, and c-axes were also obtained using a parameterized form of the BM3 EoS, and the results show βa0 < βb0 < βc0 with βa0:βb0:βc0 = 1:1.28:1.50. In addition, the bulk modulus of this study is very consistent with previously studied zoisite with similar Fe content. However, the axial compressibility is significantly different with the previous study and the compression of zoisite in this study is more isotropic, which may result from the difference in the pressure-transmitting medium.

关键词Zoisite High Pressure synchrotron Single-crystal X-ray Diffraction diamond Anvil Cell hydrous Minerals
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/10425
专题地球内部物质高温高压实验室
地球深部物质与流体作用地球化学研究室
作者单位1.Key Laboratory for High-Temperature and High-Pressure Study of the Earth’s Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
2.Hawaii Institute of Geophysics and Planetology, University of Hawaii at Manoa, Honolulu, HI 96822, USA
3.State Key Laboratory of Geological Processes and Mineral Resources, China University of Geoscience, Wuhan 430074, China
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GB/T 7714
Jingui Xu,Dongzhou Zhang,Dawei Fan,et al. Compressional behavior of natural eclogitic zoisite by synchrotron X-ray single-crystal diffraction to 34 GPa[J]. Physics and Chemistry of Minerals,2019,46:333–341.
APA Jingui Xu,Dongzhou Zhang,Dawei Fan,Xiang Wu,Feng Shi,&Wenge Zhou.(2019).Compressional behavior of natural eclogitic zoisite by synchrotron X-ray single-crystal diffraction to 34 GPa.Physics and Chemistry of Minerals,46,333–341.
MLA Jingui Xu,et al."Compressional behavior of natural eclogitic zoisite by synchrotron X-ray single-crystal diffraction to 34 GPa".Physics and Chemistry of Minerals 46(2019):333–341.
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