Infrared spectra of uranyl compounds in alkali halide matrices: oxalates and acetates

摘要

The infrared absorption spectra of uranyl oxalate and acetate in KBr matrices in the 4000-250 cm~-1 range have been examined. Special attention was devoted tot he dependence of the IR spectra on the sample treatment temperature and to the shape of the V_3 bands appearing in the range of carbon dioxide laser radiation. Heat treatment up to some 270 deg. C leads to a narrowing of the band. Higher temperatures decompose the anions to carbon dioxide, while the uranyl ions are converted either to UO_2 or potassium diuranate.