Bis(hexane-1,6-diaminium) di-μ5-hydrogenphosphato-penta-μ2-oxo-penta­kis[dioxomolybdenum(VI)] dihydrate.

The reaction of hexane-1,6-diamine with sodium molybdate and phospho­ric acid yields the title salt, (C6H18N2)2[Mo5(HPO4)2O15]·2H2O. Two penta­molybdate anions are linked by hydrogen bonds to form a dimer; the dimers are incorporated into the network structure through hydrogen bonds involving the hexane-1,6-diaminium cations and uncoordinated water mol­ecules. [ABSTRACT FROM AUTHOR]