Abstract
In the title hydrated molecular salt, 2C(4)H(16)N(3)(3+)center dot P6O186-center dot-2H(2)O, the complete cyclohexaphosphate anion is generated by crystallographic inversion symmetry. The six P atoms of the P6O186- anion form a chair conformation and the organic cation has a corrugated linear geometry. In the crystal, the cations and the anions are connected by N-H center dot center dot center dot O hydrogen bonds into slabs propagating in the ac plane. The water molecules link the slabs by accepting N-H center dot center dot center dot O links and forming O-H center dot center dot center dot O links. The triclinic polymorph was reported by Gharbi et al. [(1995).