Acta Cryst. (2006). E62, i187-i189  [ doi:10.1107/S1600536806030832 ]

Rb₃PO₄W₁₂O₃₆ from X-ray powder data

S.-Y. Mao, X.-X. Ren, X.-X. Liu and J.-X. Mi

Abstract: The crystal structure of trirubidium phosphate dodecatungstate, Rb₃PO₄W₁₂O₃₆, has been refined from X-ray powder diffraction data using the Rietveld method. The compound was obtained under hydrothermal conditions and is isotypic with K_2.4(H₃O)_0.6PO₄W₁₂O₃₆. The regular PO₄ tetrahedron (3m symmetry) is surrounded by 12 WO₆ octahedra, building the heteropolymetallate anion. By close packing of these heteropolyanionic units, orthogonally intersecting channels are formed where the Rb atoms are located. The alkali metal ion is surrounded by 12 O atoms to give a polyhedron with 2.m symmetry.

Online 16 August 2006

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