A series of Mo(VI) monophosphates involving the lone pair cation Te(IV): A(2)TeMo(2)O(6)(PO4)(2) (A = K, Rb, Tl, Cs)

A new series of Mo(VI) monophosphates containing Te(TV), A(2)TeMo(2)O(6)(PO 4)(2) with A = K, Rb, Tl, Cs, has been synthesized. Their crystal structure , determined from single crystals in the Pbcn space group (a approximate to 12.55-12.37 Angstrom, b approximate to 8.63-9.49 Angstrom, c approximate t o 11.13-11.51 Angstrom), consists of corner-sharing PO4 tetrahedra, MoO6 oc tahedra, and TeO4E trigonal bipyramids (E being the electronic lone pair of Te(IV)). The original [TeMo2P2O14](infinity) framework is remarkable by it s layered character forming [Mo2P2O14](infinity) layers interconnected thro ugh TeO4E bipyramids. The existence of intersecting tunnels running along t he [100], [010], [110], and [001] directions is also an interesting feature of this new structural type.