Raman scattering of actinide (VI) ions from carbonate media were obtained. Results indicate bidentate complexation of carbonate and linear geometry for the AnO<sup>2+</sup><sub>2</sub> ions. The trend of the frequency position of the <i>v</i><sub>1</sub> vibration in AnO<sup>2+</sup><sub>2</sub> ions is U > Np > Pu > Am in both acid and basic solutions, with higher frequencies occurring in acid media.
L. J. Basile, J. R. Ferraro, M. L. Mitchell, and J. C. Sullivan, "The Raman Scattering of Actinide (VI) Ions in Carbonate Media," Appl. Spectrosc. 32, 535-537 (1978)