High-pressure high-temperature investigation of the uranium-oxygen system
1961; Pergamon Press; Volume: 19; Issue: 3-4 Linguagem: Inglês
10.1016/0022-1902(61)80109-7
ISSN1878-1225
Autores Tópico(s)Nuclear reactor physics and engineering
ResumoAn investigation was made of the effects of combined ultrahigh pressure and high temperature on the oxides of uranium with particular emphasis on U3O8. A new polymorph of U3O8, designated γ-U3O8, occurs at pressures in excess of 16,000 atm at temperatures above 400°C. At 60,000 atm the gamma U3O8 coexists with a cubic U4O9-like phase. These results, although of a preliminary nature, show that the uranium-oxygen phase diagram is greatly modified by the effects of pressure.
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