ChemInform Abstract: IR AND THERMAL DATA OF THE PEROXO COMPOUNDS OF GROUP IVA ELEMENTS

Coprecipitation of actinide peroxide salts in the U–Th and U–Pu systems and their thermal decomposition

“…The absorption band at ν = 716 cm −1 can be ascribed to the presence of coordinated water molecules 57,61 which are present in studtite. In line with the results of Jere et al , 20 no specific band can be associated with the peroxide ligand in the thorium peroxide salt. However, similar to the work on Pu( iv ) peroxide, the bands in the 1450 to 1000 cm −1 domain can be assigned to vibrational bands of nitrate ions.…”

“…18 The resulting powder was found to be poorly crystallized, and the crystal structure of the salt remains unknown up to now. The peroxonitrate salt could be characterized by Raman spectroscopy 19,20 only. To our knowledge no study of the solubility of the thorium peroxo-nitrate is reported in mixed nitric acid and hydrogen peroxide media and the settling characteristics remain largely unexplored.…”