NASICON-type Na3V2(PO4)3

Single crystals of the title compound, trisodium divanadium-(III) tris(orthophosphate), were grown from a self-flux in the system Na4P2O7-NaVP2O7. Na3V2(PO4)(3) belongs to the family of NASICON-related structures and is built up from isolated [VO6] octahedra (3. symmetry) and [PO4] tetrahedra (.2 symmetry) interlinked via corners to establish the framework anion [V-2(PO4)(3)](3-). The two independent Na+ cations are partially occupied [site-occupancy factors = 0.805 (18) and 0.731 (7)] and are located in channels with two different oxygen environments, viz sixfold coordination for the first ((3) over bar. symmetry) and eightfold for the second (.2 symmetry) Na+ cation.