Abstract
Electronic absorption spectra of uranium(V) dioxochloro-ions were recorded in a range of alkali chloride melts at 350–850 oC. The effect of temperature and second coordination sphere on the electronic transitions in UO2Cl4 3– ions were analyzed. Temperature has a relatively minor effect on the band positions in the spectra. The effect of the cationic composition of the melt is more pronounced and the energies of φ5u → 3π1u and φ5u → 3π3u transitions shift to the higher values with increasing radii of the solvent melt cations.
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