EXTENDED X-RAY-ABSORPTION FINE-STRUCTURE STUDIES OF TRANSITION-METAL PERIODATE AND TELLURATE COMPLEXES - CRYSTAL-STRUCTURE OF RB2NA4[OSO2(H2TEO6)(2)]CENTER-DOT-16H2O

The structures of a range of transition-metal (Cu, Ag. Au, Ru, Os, Pd, Pt, Co and Mn) periodate or tellurate complexes have been determined using a combination of metal K- or L(III)-edge and iodine or tellurium K-edge extended X-ray absorption fine structure data; The crystal str ucture of the osmium(VI) tellurate Rb2Na4[OsO2(H2TeO6)(2)].6H(2)O has been determined and contains OsO6 and TeO6 octahedral groups linked vi a edge sharing to form a discrete anion.