Abstract

A molybdenophosphate, TIMo IV 2P 3O 12, with an original tunnel structure, has been isolated. Its structure has been determined by X-ray diffraction on a single crystal. It crystallizes in the orthorhombic system with a = 8.836(1), b = 9.225(1), c = 12.288(1), Å, possible space groups Pbcm and Pbc2 1 with Z =4. The structure was solved and refined in the centrosymmetric space group Pbcm. The host lattice “Mo 3P 3O 12” is built up from corner-sharing octahedra and tetrahedra and forms tunnels running along the b axis and cages where the Tl + ions are located. The relationships of this framework with that of the phosphate tungsten bronze CsP 8W 8O 40 and that of the hexagonal tungsten bronze are discussed.

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