Acta Cryst. (2005). E61, i158-i159  [ doi:10.1107/S1600536805021392 ]

Langbeinite-type mixed-valence (NH₄)(H₃O)Ti^IIITi^IV(PO₄)₃

Y.-L. Fu, Z.-W. Xu, J.-L. Ren and S. W. Ng

Abstract: The anionic component of the langbeinite-type title compound, ammonium oxonium dititanium(III,IV) tris(phosphate), is an infinite three-dimensional [Ti₂(PO₄)₃]^2- network based on PO₄ tetrahedra corner-linked to TiO₆ octahedra; the charge-balancing ammonium and oxonium cations occupy the cavities in the network and interact by way of N-HO and O-HO hydrogen bonds. The two independent Ti atoms, the ammonium N atom and the oxonium O atom lie on special positions of site symmetry 3.

Online 9 July 2005

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