中国物理B ›› 2018, Vol. 27 ›› Issue (1): 17402-017402.doi: 10.1088/1674-1056/27/1/017402

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

High-pressure synchrotron x-ray diffraction and Raman spectroscopic study of plumbogummite

Duan Kang(康端), Xiang Wu(巫翔), Guan Yuan(袁冠), Sheng-Xuan Huang(黄圣轩), Jing-Jing Niu(牛菁菁), Jing Gao(高静), Shan Qin(秦善)   

  1. 1 Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing 100871, China;
    2 State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China
  • 收稿日期:2017-04-18 修回日期:2017-10-18 出版日期:2018-01-05 发布日期:2018-01-05
  • 通讯作者: Xiang Wu E-mail:wuxiang@cug.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 41473056 and 41472037).

High-pressure synchrotron x-ray diffraction and Raman spectroscopic study of plumbogummite

Duan Kang(康端)1, Xiang Wu(巫翔)2, Guan Yuan(袁冠)1, Sheng-Xuan Huang(黄圣轩)1, Jing-Jing Niu(牛菁菁)1, Jing Gao(高静)1, Shan Qin(秦善)1   

  1. 1 Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing 100871, China;
    2 State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China
  • Received:2017-04-18 Revised:2017-10-18 Online:2018-01-05 Published:2018-01-05
  • Contact: Xiang Wu E-mail:wuxiang@cug.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 41473056 and 41472037).

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摘要： PbAl3(PO4)2(OH,H2O)6, an important environmental mineral, is in-situ studied by synchrotron x-ray diffraction (XRD) and Raman scattering combined with diamond anvil cells (DACs) at pressures up to~11.0 GPa and room temperature. The XRD results indicate that plumbogummite does not undergo a phase transition between 0 GPa and 10.9 GPa. Moreover, the c axis is more compressible than the a axis, revealing its anisotropic behavior. The pressure-volume data are fitted to the third-order Birch-Murnaghan equation of state to yield the plumbogummite bulk modulus K0 of 68(1) GPa and K'0 of 6.1. The[PO4]3- and[HPO4]2- Raman vibrational modes exhibit scale nearly linearly as a function of pressure. The[PO4]3- stretching modes are generally more sensitive to pressure than the bending modes. The Grüneisen parameters range from -0.07 to 1.19, with an arithmetic mean of approximately 0.39.

关键词: plumbogummite, equation of state, Grüneisen parameter, diamond anvil cell

Abstract: PbAl3(PO4)2(OH,H2O)6, an important environmental mineral, is in-situ studied by synchrotron x-ray diffraction (XRD) and Raman scattering combined with diamond anvil cells (DACs) at pressures up to~11.0 GPa and room temperature. The XRD results indicate that plumbogummite does not undergo a phase transition between 0 GPa and 10.9 GPa. Moreover, the c axis is more compressible than the a axis, revealing its anisotropic behavior. The pressure-volume data are fitted to the third-order Birch-Murnaghan equation of state to yield the plumbogummite bulk modulus K0 of 68(1) GPa and K'0 of 6.1. The[PO4]3- and[HPO4]2- Raman vibrational modes exhibit scale nearly linearly as a function of pressure. The[PO4]3- stretching modes are generally more sensitive to pressure than the bending modes. The Grüneisen parameters range from -0.07 to 1.19, with an arithmetic mean of approximately 0.39.

Key words: plumbogummite, equation of state, Grüneisen parameter, diamond anvil cell

中图分类号:  (Raman and optical spectroscopy)

  • 74.25.nd
74.25.Ld (Mechanical and acoustical properties, elasticity, and ultrasonic Attenuation)