Acta Cryst. (2009). E65, i8  [ doi:10.1107/S1600536809001433 ]

Redetermination of EuScO₃

V. Kahlenberg, D. Maier and B. Velickov

Abstract: Single crystals of europium(III) scandate(III), with ideal formula EuScO₃, were grown from the melt using the micro-pulling-down method. The title compound crystallizes in an orthorhombic distorted perovskite-type structure, where Eu occupies the eightfold coordinated A sites (site symmetry m) and Sc resides on the centres of corner-sharing [ScO₆] octahedra (B sites with site symmetry ). The structure of EuScO₃ has been reported previously based on powder diffraction data [Liferovich & Mitchell (2004). J. Solid State Chem. 177, 2188-2197]. The results of the current redetermination based on single-crystal diffraction data shows an improvement in the precision of the structral and geometric parameters and reveals a defect-type structure. Site-occupancy refinements indicate an Eu deficiency on the A site coupled with O defects on one of the two O-atom positions. The crystallochemical formula of the investigated sample may thus be written as ^A(_0.032Eu_0.968)^BScO_2.952.

Online 17 January 2009

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