LiAl5O8高压相变研究

武琪; 彭放; 李庆华; 雷力; 李荣祺

doi:10.11858/gywlxb.2012.03.015

LiAl5O8高压相变研究

doi: 10.11858/gywlxb.2012.03.015

武琪¹,
彭放^1, ,,
李庆华¹,
雷力²,
李荣祺¹

1.
四川大学原子与分子物理研究所，四川成都 610065；
2.
爱媛大学地球动力学研究中心，日本松山 790-8677

详细信息

通讯作者:
彭放 pengfang8888@yahoo.com.cn

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出版历程
- 收稿日期: 2011-01-05
- 修回日期: 2011-03-28
- 发布日期: 2012-06-15

Pressure-Iduced Phase Transition of LiAl5O8

WU Qi¹,
PENG Fang^{1
, ,},
LI Qing-Hua¹,
LEI Li²,
LI Rong-Qi¹

1.
Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;
2.
Geodynamics Research Center, Ehime University Bunkyo-cho 2-5, Matsuyama 790-8577, Japan

摘要

摘要: 运用金刚石压砧同步辐射X射线衍射，对尖晶石结构的LiAl5O8进行了高压原位研究。实验发现：在高压下，一组LiAl5O8的新相衍射峰出现，随着压力的增加，其新相衍射峰逐渐增强，当压力增加到45.0 GPa时，LiAl5O8的低压相衍射峰全部消失，而形成了一组高压新相衍射峰。采用指标化程序对衍射数据进行处理和分析，确定这一高压新相为正交晶系结构，其晶胞参数为a=0.995 9 nm，b=0.644 7 nm，c=0.333 4 nm ，空间群为Pmm2。
- LiAl5O8 /
- 高压 /
- 相变
Abstract: A phase transition concerning lithium aluminate oxide (LiAl5O8) was observed. High pressure synchrotron radiation X-ray diffraction was used to explore its structure in a diamond anvil cell up to 47.0 GPa. We found the two phases are coexisted over a very large pressure range in the experiments. According to the analysis on the dynamic change of diffraction peaks with the increasing of pressure and the data reduction using indexed program, a new high-pressure phase of LiAl5O8 was identified at pressure below 45.0 GPa. This new phase has potentially a orthorhombic structure with a=0.995 9 nm, b=0.644 7 nm, c=0.333 4 nm and the space group of Pmm2.
- LiAl5O8 /
- high pressure /
- phase transition

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参考文献(18)

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