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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)
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2010 (English)In: Journal of Alloys and Compounds, ISSN 0925-8388, Vol. 498, no 1, 42-51 p.Article in journal (Refereed) Published
Abstract [en]

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 (3) over barm 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)(2)(4-) 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 (3) over barm (D-3d(5)). 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.

Place, publisher, year, edition, pages
2010. Vol. 498, no 1, 42-51 p.
Keyword [en]
Orthovanadates, X-ray diffraction, Rietveld refinements, Raman spectroscopy, Ba3-xSrx(VO4)(2)
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Research subject
Earth Science with specialization in Mineral Chemistry, Petrology and Tectonics
URN: urn:nbn:se:uu:diva-119747DOI: 10.1016/j.jallcom.2010.03.066ISI: 000278709700009OAI: oai:DiVA.org:uu-119747DiVA: diva2:300781
Available from: 2010-03-01 Created: 2010-03-01 Last updated: 2013-01-15Bibliographically approved

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Lazor, P.
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