Synthesis and structure of vanadoperiodate

Two vanadoperiodates of the decavanadate structure, [IV9O28](4-) and [HIV9O28](3-), have been synthesized and structurally characterized. The I atom replaces only the central V atom of [V10O28](6-) in [HIV9O28](3-), while replacement at both central and capping sites is observed for [IV9O28](4-). The proton in [HIV9O28](3-) is probably attached to one of the oxygen atoms that bridges two V atoms. The [HIV9O28](3-) anion is structurally very similar to [HTeV9O28](4-). This structural similarity is reminiscent of that observed between the Anderson-type molybdotellurate and molybdoperiodate, [TeMo6O24](6-) and [IMo6O24](5-). (c) 2012 Elsevier Ltd. All rights reserved.