Acta Cryst. (2005). E61, i204-i207  [ doi:10.1107/S1600536805025705 ]

Caesium gadolinium polyphosphate, CsGd(PO₃)₄

H. Naïli and T. Mhiri

Abstract: Crystals of CsGd(PO₃)₄ have been grown by the flux technique from a mixture of CsH₂PO₄, Gd₂O₃ and H₃PO₄. CsGd(PO₃)₄ crystallizes in structure type IV of the M^IM^III(PO₃)₄ (M^I = alkali metal, M^III = rare earth or Bi) family of compounds. The structure consists of a three-dimensional framework made up of spiral (PO₃)_n chains linked by GdO₈ polyhedra. Two infinite (PO₃)_n chains with a period of eight tetrahedra run along the [101] direction. Gd and Cs cations are surrounded by eight and eleven O atoms, respectively.

Online 17 August 2005

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