Hydrothermal Synthesis of a New Vanadium Tellurate(VI) with a Novel Chain Structure: (NH4)4{(VO2)2[Te2O8(OH)2]}·2H2O

A new ammonium vanadium tellurate, (NH4)4{(VO2)2(Te2O8(OH)2)}·2H2 O( 1) was hydrothermally syn- thesized and characterized by elemental analyses, IR spectrum, TG analysis, and single crystal Xray diffraction. Compound 1 crystal- lizes in the monoclinic system, space group P21/n, a 7.3843(15) A u , b 17.111(3) A u , c 7.3916(15) A u , β 118.88(3)°, V 817.9(3) A u 3 , Z 2, R1 (I>2σ(I)) 0.0235, wR2 (all data) 0.0462. The structure of 1 consists of infinite anionic chains, {(VO2)2(Te2O8(OH)2)} 4 which contain octahedral VO6 and TeO 5OH units. Each octahedral VO6 and TeO5OH unit is con- nected by sharing an edge to form V2O10 and Te2O8(OH)2 bi