Published 1967
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Non stoichiometry in U3O(8±x), its temperature and oxygen pressure dependence
- 1. Commissariat a l'Energie Atomique, Grenoble (France). Centre d'Etudes Nucleaires
Description
The deviation from stoichiometry in uranium oxide U3O8 obtained by oxidation of UO2, has been studied with respect to its dependence on temperature and oxygen pressure. It is shown that the ratio r = O/U increases with oxygen pressure up to 200 mm Hg at any temperature. At higher pressures, this ratio tends toward a limit which decreases with increasing temperatures. The curve r = f(P) suggest a chemisorption phenomenon as the reaction limiting mechanism. (authors)
Availability note (English)
Available from INIS in electronic formAbstract (French)
La stoechiometrie de l'oxyde U3O8 forme par oxydation de l'oxyde UO2 est etudiee en fonction de la temperature et de la pression de l'oxygene. Les auteurs montrent que le rapport r = O/U croit avec cette derniere, jusqu'a 200 mm de mercure, a toute temperature. Pour les pressions plus elevees ce rapport tend vers une limite qui decroit quand la temperature augmente. Les courbes r = f(P) laissent supposer que le mecanisme de cette reaction est gouverne par un phenomene de chimisorption. (auteurs)Files
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Additional details
Additional titles
- Original title (French)
- Sur la stoechiometrie de l'oxyde U
Publishing Information
- Imprint Pagination
- 10 p.
- Report number
- CEA-R--3218
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 37017834
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CHEMISORPTION; OXYGEN; PRESSURE DEPENDENCE; STOICHIOMETRY; TEMPERATURE DEPENDENCE; URANIUM DIOXIDE; URANIUM OXIDES U3O8
- Descriptors DEC
- ACTINIDE COMPOUNDS; CHALCOGENIDES; CHEMICAL REACTIONS; ELEMENTS; NONMETALS; OXIDES; OXYGEN COMPOUNDS; SEPARATION PROCESSES; SORPTION; URANIUM COMPOUNDS; URANIUM OXIDES
Optional Information
- Notes
- 3 refs.