Stability of tetravalent actinides in perovskites
Conference
·
OSTI ID:5919267
This paper reports the first determination of the enthalpy of formation of a complex actinide(IV) oxide: ..delta..H/sup 0//sub f/ (BaUO/sub 3/, s, 298 K) = -1690 +- 10 kJ mol/sup -1/. The preparation and properties of this and other actinide(IV) complex oxides are described and are compared with other perovskites BaMO/sub 3/. The relative stabilities of tetravalent and hexavalent uranium in various environments are compared in terms of the oxidation-reduction behavior of uranium in geological nuclear waste storage media; in perovskite, uranium(IV) is very unstable in comparison with uranium(VI).
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5919267
- Report Number(s):
- CONF-830375-2; ON: DE83014811
- Country of Publication:
- United States
- Language:
- English
Similar Records
Stability of tetravalent actinides in perovskites
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Sat Dec 31 23:00:00 EST 1983
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Near-quantitative recovery of actinides from nitric acid waste streams by solvent extraction using DHDECMP (dihexyl-N,N-diethylcarbamoylmethylphosphonate)
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Thu Dec 31 23:00:00 EST 1987
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Related Subjects
052002 -- Nuclear Fuels-- Waste Disposal & Storage
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400702* -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ACTINIDE COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
ENTHALPY
EXPERIMENTAL DATA
FORMATION HEAT
INFORMATION
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PEROVSKITES
PHYSICAL PROPERTIES
REACTION HEAT
REDOX REACTIONS
SOLUTION HEAT
STABILITY
THERMODYNAMIC PROPERTIES
URANIUM COMPOUNDS
URANIUM OXIDES
VALENCE
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400702* -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ACTINIDE COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
ENTHALPY
EXPERIMENTAL DATA
FORMATION HEAT
INFORMATION
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PEROVSKITES
PHYSICAL PROPERTIES
REACTION HEAT
REDOX REACTIONS
SOLUTION HEAT
STABILITY
THERMODYNAMIC PROPERTIES
URANIUM COMPOUNDS
URANIUM OXIDES
VALENCE