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

M. Azdouz, Bouchaib Manoun, R. Essehli, M. Azrour, L. Bih, S. Benmokhtar, A. Aït Hou, P. Lazor

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10 Citations (Scopus)

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 R over(3, ̄) m 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 R over(3, ̄) m (D3 d5). 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.

Original languageEnglish
Pages (from-to)42-51
Number of pages10
JournalJournal of Alloys and Compounds
Volume498
Issue number1
DOIs
Publication statusPublished - 21 May 2010

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Keywords

  • BaSr(VO)
  • Orthovanadates
  • Raman spectroscopy
  • Rietveld refinements
  • X-ray diffraction

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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