Bis(4-amino­pyridinium) hexa­aqua­nickel(II) bis­(sulfate)

In the title compound, (C(5)H(7)N(2))(2)[Ni(H(2)O)(6)](SO(4))(2), the Ni(II) cation is located on an inversion centre and is coordinated by six aqua ligands in a slightly distorted octa­hedral coordination environment. The [Ni(H(2)O)(6)](2+) ions are connected through an extensive network of O—H⋯O hydrogen bonds to sulfate anions, leading to the formation of layers parallel to (001). The 4-amino­pyridinium cations are located between these layers and are connected to the anionic framework by N—H⋯O hydrogen bonds. Weak π–π inter­actions between the pyridine rings, with a centroid–centroid distance of 3.754 (9) Å, provide additional stability to the crystal packing.