Hexasodium tetrahydrogen bis(triaquanickelo)icosatungstodibismuthate(III)(10 –) 36-hydrate

The polyoxometalate Na6H4[Bi2Ni2W20O70(H2O)6].36H2O prepared by substitution of Ni2+ in preformed aqueous [Bi2W22O74(OH)2] contains two β-B-BiW9O33 units sharing vertices of octahedra with two WO6 and two NiO3(H2O)3 bridging groups. The anion was previously prepared from aqueous Bi3+, Ni2+, and WO4 as the Na10 salt [Rodewald & Jeannin (1998). C. R. Acad. Sci. Ser. IIc, 1, 175–181].