Bis(2-amino-5-chloro­pyridinium) dihydrogen­diphosphate

The title compound, 2C₅H₆ClN₂⁺·H₂P₂O₇^2-, contains infinite (H₂P₂O₇^2-)_n ribbons extending along the c direction. The bridging O atom of the diphosphate anion is located on a twofold axis. The organic cations are anchored between planes parallel to ac, linking the ribbons into a three-dimensional network.