Vibrational and electronic spectra of the UO2(NO3)42– ion
Abstract
The luminescence and absorption spectra of single crystals of K2UO2(NO3)4, Rb2UO2(NO3)4 and (NH4)2UO2(NO3)4·2H2O have been measured at liquid-helium temperatures. These spectra indicate a highly symmetric environment for the uranyl ion. Infrared, Raman and electronic spectra show the presence of two types of coordinated nitrate groups. The anion therefore probably has a trans-UO2(ONO2)2(O2NO) structure with both monodentate and bidentate nitrato ligands.