Crystal Structure of Sodium 12-Molybdophosphate Hexadecahydrate

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Sodium 12-molybdophosphate hexadecahydrate, Na₃PMo₁₂O₄₀·16H₂O crystallizes in a monoclinic space group P2₁/m, with cell dimensions a = 11.4703(4)Å, b = 15.1849(6)Å, c = 13.7083(5)Å, β = 106.902(1)° and V = 2284.51(15)ų, Z = 2. The final R value is 0.0319 for 5719 reflections (I > 2σ(I)). The crystal is built up of the heteropolyanion (of the Keggin form), six-coordinated sodium ions and water molecules in a 3-D supramolecualr framework, which is produced by some different O-H…O hydrogen bonds.