Tris(5-amino-1H-1,2,4-triazol-4-ium) dihydrogenphosphate hydrogenphosphate trihydrate

In the crystal structure of the title molecular salt, 3C2H5N4+·HPO42−·H2PO4−·3H2O, the phosphate-based framework is built upon layers parallel to (010) made up from the H2PO4− and HPO42− anions and water molecules, which are interconnected through O—H...O hydrogen bonds. The organic cations are located between the phosphate–water layers and are connected to them via N—H...O hydrogen bonds. The bond-length features are consistent with an imino resonance form for the exocyclic amino group, as is commonly found for a C—N single bond involving sp2-hybridized C and N atoms