中国物理B ›› 2017, Vol. 26 ›› Issue (9): 90703-090703.doi: 10.1088/1674-1056/26/9/090703

• GENERAL • 上一篇    下一篇

Pressure-induced phase transition of B-type Y2O3

Qian Zhang(张倩), Xiang Wu(巫翔), Shan Qin(秦善)   

  1. 1 Gemological Institute, China University of Geosciences, Wuhan 430074, China;
    2 State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China;
    3 Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education & School of Earth and Space Sciences, Peking University, Beijing 100871, China
  • 收稿日期:2017-05-03 修回日期:2017-05-15 出版日期:2017-09-05 发布日期:2017-09-05
  • 通讯作者: Qian Zhang E-mail:qianzhang@cug.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. U1232204 and 41502029) and China Postdoctoral Science Foundation (Grant No. 2015M580679).

Pressure-induced phase transition of B-type Y2O3

Qian Zhang(张倩)1, Xiang Wu(巫翔)2, Shan Qin(秦善)3   

  1. 1 Gemological Institute, China University of Geosciences, Wuhan 430074, China;
    2 State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China;
    3 Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education & School of Earth and Space Sciences, Peking University, Beijing 100871, China
  • Received:2017-05-03 Revised:2017-05-15 Online:2017-09-05 Published:2017-09-05
  • Contact: Qian Zhang E-mail:qianzhang@cug.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. U1232204 and 41502029) and China Postdoctoral Science Foundation (Grant No. 2015M580679).

摘要: The synthesized monoclinic (B-type) phase of Y2O3 has been investigated by in situ angle-dispersive x-ray diffraction in a diamond anvil cell up to 44 GPa at room temperature. A phase transition occurs from monoclinic (B-type) to hexagonal (A-type) phase at 23.5 GPa and these two phases coexist even at the highest pressure. Parameters of isothermal equation of state are V0=69.0(1) Å3, K0=159(3) GPa, K0'=4 (fixed) for the B-type phase and V0=67.8(2) Å3, K0=156(3) GPa, K0'=4 (fixed) for the A-type phase. The structural anisotropy increases with increasing pressure for both phases.

关键词: Y2O3, x-ray diffraction, pressure-induced phase transition, equation of state

Abstract: The synthesized monoclinic (B-type) phase of Y2O3 has been investigated by in situ angle-dispersive x-ray diffraction in a diamond anvil cell up to 44 GPa at room temperature. A phase transition occurs from monoclinic (B-type) to hexagonal (A-type) phase at 23.5 GPa and these two phases coexist even at the highest pressure. Parameters of isothermal equation of state are V0=69.0(1) Å3, K0=159(3) GPa, K0'=4 (fixed) for the B-type phase and V0=67.8(2) Å3, K0=156(3) GPa, K0'=4 (fixed) for the A-type phase. The structural anisotropy increases with increasing pressure for both phases.

Key words: Y2O3, x-ray diffraction, pressure-induced phase transition, equation of state

中图分类号:  (High-pressure apparatus; shock tubes; diamond anvil cells)

  • 07.35.+k
61.05.cp (X-ray diffraction) 91.60.Hg (Phase changes)