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

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; a(0)a(0)a(-)) symmetry, with the parameters a=5.5849(10) A and c =7.9455(10) angstrom, for Sr2MgWO6 and triclinic (space group F-1; a(-)b(-)b(-)) symmetry, with the parameters a=8.5409(10) angstrom, b=c=8.5860(10) angstrom, alpha=89.35(1)degrees and beta=gamma=90.31(1)degrees, for Ba2SrWO6. (c) 2004 International Centre for Diffraction Data.

keywords

MICROWAVE DIELECTRIC-PROPERTIES; COMPLEX PEROVSKITE CERAMICS; IONIC PARAMETERS; SPECTROSCOPY; HZ

subject category

Materials Science

authors

Khalyavin, DD; Senos, AMR; Mantas, PQ

our authors

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