[{(Mo)Mo5O21(H2O)(3)(SO4)}(12)(VO)(30)(H2O)(20)](36-): A molecular quantum spin icosidodecahedron

Self-assembly of aqueous solutions of molybdate and vanadate under reducing, mildly acidic conditions results in a polyoxomolybdate-based {Mo72V30} cluster compound Na8K16(VO)(H2O)(5)[K-10 subset of{(Mo)Mo5O21(H2O)(3)(SO4)}(12)(VO)(30)-(H2O)(20)]center dot 150H(2)O, 1, a quantum spin-based Keplerate structure.double dagger