Acta Crystallographica Section E

Structure Reports Online

Volume 62, Part 8 (August 2006)

inorganic compounds


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Acta Cryst. (2006). E62, i169-i172    [ doi:10.1107/S1600536806025207 ]

Ammonium neodymium(III) bis[sulfate(VI)] tetrahydrate

A. Trzesowska and R. Kruszynski

Abstract: (NH4)[Nd(SO4)2(H2O)3]·H2O is isotypic with other members of the (NH4)[Ln(SO4)2(H2O)3]·H2O family (Ln = lanthanides). It contains NdO9 polyhedra and SO4 tetrahedra, which are linked by common edges and vertices, forming a layer-like arrangement parallel to (010). The neodymium cation is nine-coordinated in a distorted monocapped square antiprismatic geometry with two sulfate groups as chelating and two sulfate groups as bridging ligands. O-H...O and N-H...O hydrogen bonds consolidate the structure into a three-dimensional network. The dependence of unit-cell dimensions of the isotypic compounds on the lanthanide atomic number is discussed.

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