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Crystal chemistry, Rietveld refinements and Raman spectroscopy studies of the new solid solution series: Ba3−xSrx(VO4)2 (0 ≤ x ≤ 3)

M. Azdouza B. Manoun 1 R. Essehli 2 M. Azrour L. Bih S. Benmokhtar A. Aït Hou P. Lazor
1 Laboratoire de Chimie des Matériaux Solides
2 SUBATECH - Laboratoire SUBATECH Nantes
Abstract : The new solid solution series Ba3−xSrx(VO4)2 (0 ≤ x ≤3) has been synthesized and studied by a combination of X-ray powder diffraction and Raman vibrational spectroscopy. This continuous solid solution crystallise in the hexagonal system with View the MathML source space group. The structure has been determined at room temperature from X-ray diffraction by the Rietveld method analysis. It is formed by a 3D network of (Ba/Sr)(1)(VO4)24− layers linked into a crystal network by (Ba/Sr)2+(2) cations. The vibrational spectra of this crystalline orthovanadate solid solution series are interpreted by means of factor group analysis in terms of space group View the MathML source (View the MathML source). Assignments of the V–O vibrational stretching and bending modes, as well as some of the external modes, have been made. While all the modes show a monotonous shift as a function of the composition x, a break in the curves of intensities, full width at half maximum and band areas as a function of x is observed and attributed to the statistical distribution of Ba and Sr ions in the same crystallographic sites.
Keywords : Orthovanadates X-ray diffraction Rietveld refinements Raman spectroscopy Ba3−xSrx(VO4)2
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http://hal.in2p3.fr/in2p3-00497557
Contributor : Dominique Girod <>
Submitted on : Monday, July 5, 2010 - 11:49:25 AM
Last modification on : Wednesday, September 25, 2019 - 3:12:06 PM

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IN2P3 | UNIV-NANTES | SUBATECH | CNRS | IMT-ATLANTIQUE

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M. Azdouza, B. Manoun, R. Essehli, M. Azrour, L. Bih, et al.. Crystal chemistry, Rietveld refinements and Raman spectroscopy studies of the new solid solution series: Ba3−xSrx(VO4)2 (0 ≤ x ≤ 3). Journal of Alloys and Compounds, Elsevier, 2010, 498, pp.42-51. ⟨10.1016/j.jallcom.2010.03.066⟩. ⟨in2p3-00497557⟩

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