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A study of synthetic and natural uranium oxides by X-ray photoelectron spectroscopy |
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| Authors: | Yu A Teterin V M Kulakov A S Baev N B Nevzorov I V Melnikov V A Streltsov L G Mashirov D N Suglobov A G Zelenkov |
| Institution: | 1. I.V. Kurchatov Institute of Atomic Energy, I. V. Kurchatov Square 46, 123182, Moscow, USSR 2. IGEM, U.S.S.R. Academy of Sciences, Staromonetniy 35, 109017, Moscow, USSR 3. Radium Institute, Roentgen Street 1, 197022, Leningrad, USSR |
| Abstract: | Synthetic and natural uranium oxides UO x (2≦×≦3) have been studied with X-ray photoelectron spectroscopy (XPS) to determine the phase composition and content of uranium ions in uraninites with a varying degree of oxidation. A strong hybridization of U6p and O2s orbitals has been found which permits a quantitative assessment of the U-O bond lengths. The values of such bonds in some substances have been found to be smaller than those in synthetic U(VI) oxide. The oxides U2O5 and U3O8 contain two types of uranium ions with a varying degree of oxidation. |
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