Bis(oxonium) tetrakis(o-toluidinium) cyclohexaphosphate

In the title compound, 4C7H10N+·2H3O+·P6O186−, the complete cyclohexaphosphate anion is generated by crystallographic inversion symmetry. In the crystal, the H3O+ ions and the [P6O18]6− anions are linked by O—H...O hydrogen bonds, generating infinite layers lying parallel to the ab plane at z = {script{1over 2}}. These layers are interconnected by the organic cations, which establish N—H...O hydrogen bonds with the [P6O18]6− anions.