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Crystal structure of Sr2MgWO6 and Ba2SrWO6 determined by powder X-ray diffraction

Published online by Cambridge University Press:  06 March 2012

D. D. Khalyavin ,
A. M. R Senos  and
P. Q. Mantas
D. D. Khalyavin
Affiliation:
Department of Ceramics and Glass Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
A. M. R Senos
Affiliation:
Department of Ceramics and Glass Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
P. Q. Mantas*
Affiliation:
Department of Ceramics and Glass Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
*
a)Author to whom correspondence should be addressed; Electronic mail: pmantas@cv.ua.pt
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Abstract

The crystal structures of Sr2MgWO6 and Ba2SrWO6 compounds, studied by powder X-ray diffraction, were found to be distorted perovskites with a complete NaCl type ordering between Mg2+/W6+ and Sr2+/W6+ ions, respectively. The unit cells are characterized by the tetragonal (space group I4/m; a0a0a−) symmetry, with the parameters a=5.5849(10) Å and c=7.9455(10) Å, for Sr2MgWO6 and triclinic (space group F-1; a−b−b−) symmetry, with the parameters a=8.5409(10) Å, b=c=8.5860(10) Å, α=89.35(1)° and β=γ=90.31(1)°, for Ba2SrWO6. © 2004 International Centre for Diffraction Data.

Keywords

powder diffractiondouble perovskitemicrowave materialsSr2MgWO6Ba2SrWO6
Type
New Diffraction Data
Information
Powder Diffraction , Volume 19 , Issue 3 , September 2004 , pp. 280 - 283
Copyright
Copyright © Cambridge University Press 2004

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