Tetrapotassium tetrahydrogen-β-hexamolybdoplatinate(IV) dihydrate, K4[H4β-PtMo6O24].2H2O

The potassium salt containing the [H 4 β-PtMo 6 O 24 ] 4− polyanion, which has approximate 2mm symmetry (bent structure), has been isolated and its structure determined by single-crystal X-ray diffraction. This polyanion is an isomeric form of the 3m (flat-structure) species