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High-pressure effect on inverse spinel LiCuVO4: X-ray diffraction and Raman scattering |
| Liang Heng-Nan (梁桁楠), Ma Chun-Li (马春丽), Du Fei (杜菲), Cui Qi-Liang (崔啟良), Zou Guang-Tian (邹广田) |
| State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China |
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Abstract Effect of external quasi-hydrostatic pressure on the inverse spinel structure of LiCuVO4 was studied in this paper. High-pressure synchrotron X-ray diffraction and Raman spectroscopy measurements were carried out at room temperature up to 35.7 and 40.3 GPa, respectively. At a pressure of about 20 GPa, both Raman spectra and X-ray diffraction results indicate that LiCuVO4 was transformed into a monoclinic phase, which remained stable up to at least 35.7 GPa. Upon release of pressure, the high-pressure phase returned to the initial phase. The pressure dependence of the volume of low pressure orthorhombic phase and high-pressure monoclinic phase were described by a second-order Birch-Murnaghan equation of state, which yielded bulk modulus values of B0=197(5) and 232(8) GPa, respectively. The results support the empirical suggestion that the oxide spinels have similar bulk modulus around 200 GPa.
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Received: 28 August 2012
Revised: 12 October 2012
Accepted manuscript online:
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PACS:
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61.50.Ks
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(Crystallographic aspects of phase transformations; pressure effects)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11074089 and 11004073) and the National Basic Research Program of China (Grant No. 2011CB808200). |
Corresponding Authors:
Cui Qi-Liang
E-mail: cql@jlu.edu.cn
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Cite this article:
Liang Heng-Nan (梁桁楠), Ma Chun-Li (马春丽), Du Fei (杜菲), Cui Qi-Liang (崔啟良), Zou Guang-Tian (邹广田) High-pressure effect on inverse spinel LiCuVO4: X-ray diffraction and Raman scattering 2013 Chin. Phys. B 22 016103
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