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X-ray diffraction and Raman spectroscopy studies of BaSrMWO6 (M=Ni, Co, Mg) double perovskite oxides
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2011 (English)In: Journal of Molecular Structure, ISSN 0022-2860, E-ISSN 1872-8014, Vol. 985, no 2-3, 339-345 p.Article in journal (Refereed) Published
Abstract [en]

In this work we report on the crystal structure and Raman spectroscopy of BaSrMWO6 (M=Ni, Co, Mg) double perovskite oxides. The results showed that the Ni, Co and Mg containing compounds crystallize in a cubic system with the space group Fm-3 in. The double perovskite structure can be represented as a three-dimensional network of alternating MO6 and WO6 octahedra, with Ba- and Sr-atoms occupying the interstitial spaces. The Raman spectra of this crystalline perovskite oxides are interpreted by means of factor group analysis in terms of space group Fm-3 m. Assignments of the W-O vibrational stretching and bending modes have been made. High temperature Raman spectroscopy of BaSrNiWO6 showed that all lattice modes illustrate a linear decrease in wavenumbers while temperature is increased. No discontinuities, in the temperature changes, in wavenumber observed for all modes recorded: indicating that the structure remains cubic and stable up the highest temperature studied here.

Place, publisher, year, edition, pages
2011. Vol. 985, no 2-3, 339-345 p.
Keyword [en]
Double perovskites, X-ray diffraction, Rietveld method, BaSrMWO6
National Category
Earth and Related Environmental Sciences
URN: urn:nbn:se:uu:diva-148602DOI: 10.1016/j.molstruc.2010.11.017ISI: 000286953100026OAI: oai:DiVA.org:uu-148602DiVA: diva2:402506
Available from: 2011-03-08 Created: 2011-03-08 Last updated: 2011-03-08Bibliographically approved

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