Liquid-liquid distribution, spectrophotometric, thermal, IR and Raman studies on selenito uranylates

Uranyl selenite, precipitated from an uranyl solution by selenous acid, redissolves in excess acid to yield a binegative apparently octahedral, anionic complex. The compounds UO2SeO3, (NH4)2[(UO2)2(SeO3)3(H2O)6], (NH4)2[UO2(SeO3)2], K2[(UO2)2(SeO3)3(H2O)2] and K2[UO2(SeO3)2(H2O)2]H2O have been prepared and analysed. On the basis of their thermal, IR, Raman and X-ray diffraction studies and other properties, a polymetric structure involving bridging oxygen atoms has been suggested. (author)