inorganic compounds
Hydrothermally prepared zinc dihydroxy divanadate dihydrate crystallizes in the trigonal system (space group Pm1). Its structure was solved ab initio from conventional X-ray powder data. Zn atoms occupy three of four octahedral sites in the close-packed layer of O atoms. These layers are connected by pyrovanadate groups and form a porous framework. Relatively large cavities are filled with water molecules.