(IUCr) Crystallography Journals Online

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Acta Cryst. (2006). E62, m2310-m2312 [ doi:10.1107/S1600536806033186 ]

Redetermination of ammonium bisoxalatobismuthate(III) x-hydrate from single-crystal data

J.-Y. Yang, Y.-L. Fu, J. Chu and S. W. Ng

Abstract: In the crystal structure of the title compound, poly[ammonium di- [mu] ₂-oxalato-bismuthate(III) 3.72-hydrate], NH₄[Bi(C₂O₄)₂]·3.72H₂O, the Bi³⁺ ion and the centre of the [NH₄]⁺ ion lie on different special positions of $\\overline{4}$ m2 site symmetry, and the oxalate group and one water molecule on different special positions of m site symmetry; the second water molecule lies on a special position of 2/m site symmetry. The Bi atom is eight-coordinate in a slightly distorted dodecahedral environment. This single-crystal redetermination improves the precision of the previous powder diffraction study [Vanhoyland et al. (2004). Inorg. Chem. 43, 785-789], as all non-H atoms have been refined anisotropically.

Online 25 August 2006