organic compounds
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In the title hydrated molecular salt, 2C4H16N33+·P6O186−·2H2O, 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—HO hydrogen bonds into slabs propagating in the ac plane. The water molecules link the slabs by accepting N—HO links and forming O—HO links. The triclinic polymorph was reported by Gharbi et al. [(1995). J. Solid State Chem. 114, 42–51].