Acta Crystallographica Section B

Structural Science

Volume 61, Part 3 (June 2005)

research papers

Acta Cryst. (2005). B61, 258-262 [ doi:10.1107/S0108768105012395 ]

Structures of the ordered double perovskites Sr₂YTaO₆ and Sr₂YNbO₆

C. J. Howard, P. W. Barnes, B. J. Kennedy and P. M. Woodward

Abstract: The ordered perovskite Sr₂YTaO₆, distrontium yttrium tantalum hexaoxide, has been reported as showing an unusual triclinic structure, at odds with the results from a recent group-theoretical analysis. A new investigation establishes that Sr₂YTaO₆ and the isostructural Sr₂YNbO₆, distrontium yttrium niobium hexaoxide, in fact both adopt the commonly occurring monoclinic structure, with the space-group symmetry P2₁/n.

Keywords: ordered perovskites; octahedral tilting; X-ray diffraction; neutron diffraction.


	Rietveld powder data file (CIF format) (170.6 kbytes) X-ray powder data

	Rietveld powder data file (CIF format) (28.5 kbytes) Neutron powder data

	Rietveld powder data file (CIF format) (61.1 kbytes) X-ray powder data

	Rietveld powder data file (CIF format) (372.4 kbytes) Time-of-flight neutron data

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