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- Title
Oxidation State of Neptunium and Plutonium and Their Leaching from Sodium-Aluminum-(Iron) Phosphate Glasses.
- Authors
Stefanovsky, S. V.; Maslakov, K. I.; Teterin, Yu. A.; Kalmykov, S. N.; Danilov, S. S.; Teterin, A. Yu.; Ivanov, K. E.
- Abstract
The oxidation states of neptunium and plutonium in doped sodium-aluminum-(iron) phosphate glasses have been determined by X-ray photoelectron spectroscopy. Neptunium is present in the form of Np(IV) as Np4+ and, in smaller amounts, in the form of Np(V) as neptunyl ions. Plutonium is present mainly in the form of Pu(IV) and additionally Pu(III). The most easily water-leachable element is neptunium, which is attributed to its existence in the mobile form of neptunyl (NpO2)+. The leaching rates of plutonium and impurity americium are approximately two orders of magnitude lower.
- Subjects
OXIDATION states; NEPTUNIUM; PLUTONIUM; SODIUM compounds; PHOSPHATES
- Publication
Doklady Physical Chemistry, 2018, Vol 478, Issue 1, p6
- ISSN
0012-5016
- Publication type
Article
- DOI
10.1134/S0012501618010025