Acta Cryst. (2013). E69, i17
[ doi:10.1107/S1600536813003541 ]

Barium dierbium(III) tetrasulfide

A. Mesbah, W. Stojko and J. A. Ibers

Abstract: Barium dierbium(III) tetrasulfide, BaEr₂S₄, crystallizes with four formula units in the orthorhombic space group Pnma in the CaFe₂O₄ structure type. The asymmetric unit contains two Er, one Ba, and four S atoms, each with .m. site symmetry. The structure consists of channels formed by corner- and edge-sharing ErS₆ octahedra in which Ba atoms reside. The resultant coordination of Ba is that of a bicapped trigonal prism.

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