title: Bis(oxonium) tetra-kis(o-toluidinium) cyclo-hexa-phosphate.
abstract: In the title compound, 4C(7)H(10)N(+)·2H(3)O(+)·P(6)O(18) (6-), the complete cyclo-hexa-phosphate anion is generated by crystallographic inversion symmetry. In the crystal, the H(3)O(+) ions and the [P(6)O(18)](6-) anions are linked by O-H⋯O hydrogen bonds, generating infinite layers lying parallel to the ab plane at z = 1/2. These layers are inter-connected by the organic cations, which establish N-H⋯O hydrogen bonds with the [P(6)O(18)](6-) anions.
authors.forename: Houda
authors.initials: H
authors.lastname: Marouani
authors.forename: Mohamed
authors.initials: M
authors.lastname: Rzaigui
authors.forename: Salem S
authors.initials: SS
authors.lastname: Al-Deyab