The structure of a novel vanadyl (IV) orthophosphate hydrate (VO)3(PO4)2 · 9H2O has been solved and refined with the use of high resolution X-ray powder diffraction data taken on Beamline X7A at the National Synchrotron Light Source (NSLS) at Brookhaven National Laboratory (BNL). The unit cell is monoclinic, P21n, Z = 2, a = 7.4315(1), b = 16.6256(2), c = 6.2954(1) Å, β = 92.388°(1)). The structure consists of large “squares” of (VO6PO4)4 moieties linked together by bridging PO4 tetrahedra and VO6 octahedra forming a corrugated layered structure in three dimensions with water molecules located within the open cells.
