Abstract
A new lead vanadium(V) monophosphate hydrate Pb2V2O4(PO4)2·2H2O has been synthesized using hydrothermal techniques. It crystallizes in the P1 21/a 1 space group with a = 10.008(1) A, b = 10.140(1) A, c = 10.569(2) A and β = 93.89(1)°. Its structure consists of corner-sharing VO6, VO4(H2O)2 octahedra and PO4 tetrahedra forming [VPO7]∞ layers interconnected through [VPO6(H2O)2]∞ chains. Such a tridimensional framework delimits large interconnected cavities occupied by lead cations. This structure is compared to the only two lead vanadophosphate hydrates α-βPb(VO)2(PO4)2·4H2O that are actually known.
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