An open-framework borophosphate, LiCu(2)BP(2)O(8)(OH)(2).

The open-framework alkaline-earth metal borophosphate, lithium dicopper(II) borophosphate dihydroxide, LiCu(2)BP(2)O(8)(OH)(2), was synthesized hydro-thermally. Its structure may be regarded as a layer formed via BO(4) and PO(4) tetra-hedra bonding together with distorted CuO(6) and LiO(6) octa-hedral units. Each P atom is connected to B, Li and Cu atoms through a bridging O atom. The B atom lies on a crystallographic twofold axis and the Li atom lies on a center of symmetry. The two metal centers are connected to each other by Cu-O-Li bonds.