| Autor: |
Domanov, V., Lobanov, Yu. |
| Předmět: |
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| Zdroj: |
Radiochemistry; Oct2011, Vol. 53 Issue 5, p453-456, 4p |
| Abstrakt: |
Thermal oxidation of trace amounts of curium hydride yields a volatile form of CmO and the previously unknown trioxide CmO. They were separated by gas thermochromatography. Under the experimental conditions, the maxima of the deposition zones of Cm oxides on the surface of the quartz column were at 550 ± 25 and 390 ± 25°C, respectively. The calculated enthalpies of adsorption on quartz (kJ mol) were 185 ± 25 (for CmO) and 157 ± 25 (for CmO). Lower volatility of Cm di- and trioxide, compared to the analogous oxides of U, Np, Pu, and Am, is attributed to a decrease in the ionic radii of actinides along the actinide series and to the break in the order of filling of the 5 f shell in going from Am to Cm. The existence of volatile oxyfluoride and hexafluoride of Cm(VI) was suggested. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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