Poly[hemi(ethyl­enediammonium) [di-μ-oxalato-indium(III)] dihydrate]

In title compound, {(C(2)H(10)N(2))(0.5)[In(C(2)O(4))(2)]·2H(2)O}(n), the unique In(III) ion is coordinated by eight O atoms from four oxalate ligands in a distorted square-anti­prismatic environment. The doubly bis-chelating oxalate ligands act as bridging ligands connecting symmetry-related In(III) ions and forming a three-dimensional open framework structure. Ethyl­enediammonium cations and water mol­ecules occupy the voids within the structure. The unique ethyl­enediammonium cation and one water mol­ecule both lie on a twofold rotation axis. One of the other two water mol­ecules residing on general crystallographic sites was refined as disordered with half occupancy. In the crystal structure, cations and water mol­ecules are linked to the anionic framework via inter­molecular O—H⋯O and N—H⋯O hydrogen bonds.