Bis[1-(2,3-di­methyl­phen­yl)piperazine-1,4-diium] bis­(oxonium) cyclo­hexa­phosphate dihydrate

In the title compound, 2C₁₂H₂₀N₂²⁺·2H₃O⁺·P₆O₁₈⁶⁻·2H₂O, a protonated water mol­ecule bridges the centrosymmetrical anionic P₆O₁₈ ring via O—H...O hydrogen bonds. The centrosymmetric hydrogen-bonded rings formed by four oxonium cations and four phosphate anions can be described by an R₄⁸(36) graph-set motif. The ring motifs are connected by hydrogen bonds into inorganic layers perpendicular to [100]. The 1-(2,3-di­methyl­phen­yl)piperazine-1,4-diium cations are located between the layers, compensating their negative charge and establishing N—H...O hydrogen bonds with the O atoms of the anionic framework.