Identification of oligomeric uranyl complexes under highly alkaline conditions

Konze, Wayde V.; Clark, David L.; Conradson, Steven D.; Donohoe, J.; Gordon, John C.; Gordon, Pamela L.; Keogh, D. Webster; Morris, David E.; Tait, C. Drew
July 2000
AIP Conference Proceedings;2000, Vol. 532 Issue 1, p261
Academic Journal
By utilizing X-ray absorption methods, e.g., extended x-ray absorption fine structure (EXAFS) and single crystal x-ray diffraction (XRD), as well as Raman, UV-Vis and fluorescence spectroscopy, we have shown that an equilibrium exists between the monomeric uranyl hydroxide species UO[sub 2](OH)[sub 4][sup 2-] and UO[sub 2](OH)[sub 5][sup 3-], which is dependent upon hydroxide concentration. Upon further study of this system, we have now determined that a new hydrolysis product is present in equilibrium with the monomeric uranyl hydroxide species, which is favored at higher UO[sub 2][sup 2+] concentrations. © 2000 American Institute of Physics.


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