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THE GRAVIMETRIC STANDARDS UO$sub 2$ AND U$sub 3$$O$$sub 8$ USED IN THE URANIUM-OXYGEN SYSTEM (in French)

Journal Article · · Compt. Rend.
OSTI ID:4725072
;
The behavior of uranium oxides at 800 un. Concent 85% in air and at 900 un. Concent 85% in hydrogen was studied with a thermobalance. The variations of the composition of the oxide could be followed without tempering or manipulation of the product. The starting material was natural uranium with an impurity rate below 173 x 10/sup -6/. The uranium was oxidized in air at 800 un. Concent 85% C, the product was reduced in dry hydrogen at 900 un. Concent 85% , and the oxide was reoxidized in air at 800 un. Concent 85% . The composition of the oxides was calculated using 238.038 as the atomic weight of U. The results showed that the compound obtained by direct oxidation of U in air is slightly deficient in oxygen with respect to U/sub 3/O/sub 8/. The reduction product is not deficient in oxygen with respect to UO/sub 2/, and it is a good gravimetric standard. The product obtained by oxidation of oxides of the UO/sub 2+x/ phase in air at 800 un. Concent 85% C is stoichiometric U/sub 3/O/sub 8/. (J.S. R.)
Research Organization:
Faculte des Sciences, Paris
NSA Number:
NSA-17-023317
OSTI ID:
4725072
Journal Information:
Compt. Rend., Journal Name: Compt. Rend. Vol. Vol: 256
Country of Publication:
Country unknown/Code not available
Language:
French

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Related Subjects

AIR
CHEMISTRY
HIGH TEMPERATURE
HYDROGEN
IMPURITIES
OXIDATION
REDUCTION
STANDARDS
TEMPERATURE
U3O8
URANIUM
URANIUM DIOXIDE
VARIATIONS
WEIGHT