Abstract
A molybdenum(V) monophosphate containing lead has been synthesized for the first time. This new phase Pb3(MoO)3(PO4)5 crystallizes in the Pnma space group with a=14.280(1) Å, b=15.679(1) Å, and c=8.129(1) Å. The crystal structure was refined up to R=0.0406 and Rw=0.0446. The original three-dimensionnal framework of this compound, [Mo3P5O23]∞, can be described by the assemblage of [Mo3P5O28]∞ ribbons running along b→ and forming elliptic tunnels where the Pb2+ cations are located. The topological analogy of this structure with aeschynite is emphasized. The stereoactivity of the 6s2 lone pair of Pb2+ is discussed.
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