Abstract
In the title compound, 4C(7)H(10)N(+)center dot 2H(3)O(+)center dot 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 center dot center dot center dot O hydrogen bonds, generating infinite layers lying parallel to the ab plane at z = 1/2. These layers are interconnected by the organic cations, which establish N-H center dot center dot center dot O hydrogen bonds with the [P6O18](6-) anions.