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Issue 32, 2013
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High pressure Raman scattering and X-ray diffraction studies of MgNb2O6

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Abstract

High pressure X-ray diffraction and Raman scattering studies have been carried out on magnesium niobate (MgNb2O6) in a diamond anvil cell (DAC) at room temperature up to 40 GPa. A pressure-induced phase transition was observed at pressures above 10 GPa accompanied by a softening of the internal ν9 (B3g) modes. Raman scattering results reveal that the distortion of the NbO6 octahedra decreases under high pressure. According to the X-ray diffraction data, the high pressure phase can be indexed with a monoclinic unit cell. The initial orthorhombic phase changes to a monoclinic phase possibly due to the rotation of the NbO6 octahedra, similar to some perovskite ABO3 structures.

Graphical abstract: High pressure Raman scattering and X-ray diffraction studies of MgNb2O6

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Publication details

The article was received on 22 Oct 2012, accepted on 17 May 2013 and first published on 22 May 2013


Article type: Paper
DOI: 10.1039/C3RA22590A
Citation: RSC Adv., 2013,3, 13210-13213
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    High pressure Raman scattering and X-ray diffraction studies of MgNb2O6

    F. Huang, Q. Zhou, C. Ma, L. Li, X. Huang, F. Li, Q. Cui, D. Xu, W. Wang, T. Cui and G. Zou, RSC Adv., 2013, 3, 13210
    DOI: 10.1039/C3RA22590A

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