Tris(ethyl­enediammonium) bis­[(2-amino­ethyl)ammonium] bis­[bis­(μ(5)-hydrogen phosphato)penta-μ(2)-oxido-deca­oxido­penta­molybdenum(VI)] deca­hydrate

The title compound, (C(2)H(10)N(2))(3)(C(2)H(9)N(2))(2)[Mo(5)(HPO(4))(2)O(15)]·10H(2)O, was prepared under hydro­thermal conditions at pH 5.0. The structure contains mono- and diprotonated ethyl­enediamine cations, [Mo(5)O(15)(HPO(4))(2)](4−) anions and uncoord­in­ated water mol­ecules. The [Mo(5)O(15)(HPO(4))(2)](4−) hetero­poly­oxometallate anion is made up of five MoO(6) octa­hedra sharing an edge and forming a ring, which is closed by common corners of the terminal MoO(6) octa­hedron. The ring is topped on both sides by two slightly distorted PO(4) tetra­hedra, sharing three corners with three MoO(6) octa­hedra. The terminal oxygen atoms of the PO(4) units are protonated. Together with the anions, the water mol­ecules and the ethyl­enediammonium cations are involved in N—H⋯O and O—H⋯O hydrogen bonding, forming a three-dimensional supra­molecular network.