Bis(2-amino-4-methyl­pyrimidin-1-ium) hexa­aqua­cobalt(II) disulfate dihydrate

In the title hydrated mixed-cation salt, (C(5)H(8)N(3))(2)[Co(H(2)O)(6)](SO(4))(2)·2H(2)O, the complete octa­hedral hexa­aqua complex cation is generated by crystallographic inversion symmetry. In the crystal, the components are linked by O—H⋯O and N—H⋯O hydrogen bonds, the latter, involving pyrimidinium cations and sulfate anions, generating R (2) (2)(8) loops. These, together with π–π inter­actions between centrosymmetrically related pyrimidinium cations [centroid–centroid separation = 3.5460 (8) Å], lead to the formation of a three-dimensional network.