Cyclohexane-1,4-diammonium tetrahydroxotetraborate 2.5-hydrate

In the title compound, [C6H10(NH3)2]2+·[B4O5(OH)4]2−·2.5H2O, the asymmetric unit contains one anion, two half-cations and 2.5 water molecules. Each cation is centrosymmetric. In the crystal structure, the anions are connected to each other via hydrogen bonding, forming a three-dimensional framework with rectangular channels, which are occupied by the templating organic amine cations and guest water molecules.