JOURNAL of the Tunisian Chemical Society

The current-voltage curves were obtained at different electrodes in the eutectic NaF-NaBF₄ melt. Various compounds of uranium were dissolved in the molten salt and then studied electrochemically. The oxidized form U(VI) and the reduced form U(IV) can be simultaneously stable and make up the forms of an electrochemical system. Oxidization of U(IV) occurs according to the following scheme :
UF₆^2- → [UF_n]^6-n + 2é + (6-n) F^-
[UF_n]^6-n + 2O^2- → UO₂F₄^2- + (n-4)F^-

A. Gadri, M. Brigaudeau

Pages 21-27