Fluorescence and the state of U(VI) in very dilute solutions

Uranyl nitrate, uranyl carbonate, and alkali solutions of U(VI) have been examined at 77° K at 4.2×10^–7 to 8.4×10^–4 M. The state of U(VI) in these solutions is determined.We are indebted to Professor P. N. Palei for direction, to V. I. Lebedev for the flame-photometric determination of Na, and to A. Ya Volkova for recording the powder pattern.