Acta Cryst. (2006). E62, i160-i162  [ doi:10.1107/S1600536806021635 ]

The langbeinite type Rb₂TiY(PO₄)₃

J. C. M. Gustafsson, S. T. Norberg and G. Svensson

Abstract: Dirubidium titanium yttrium triphosphate belongs to the langbeinite structure type with a framework of MO₆ octahedra (M = Ti, Y) sharing corners with PO₄ tetrahedra and vice versa, creating cages in which the Rb⁺ cations are located. The compound exhibits mixed Ti/Y populations in the two crystallographically independent octahedral sites of symmetry 3. More than two-thirds of the yttrium is found in one site and the remaining amount in the other; this is caused by the difference in coordination for the two sites.

Online 28 June 2006

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