Chemical thermodynamic representations of and

Conference · Sun Jan 01 00:00:00 EST 1984

OSTI ID:5444006

Besmann, T M; Lindemer, T B

All available oxygen potential-temperature-composition data for the calcium fluorite-structure phase were retrieved from the literature and utilized in the development of a binary solid solution representation of the phase. The data and phase relations are found to be best described by a solution of (Pu/sub 4/3/O/sub 2/) and (PuO/sub 2/) with a temperature dependent interaction energy. The fluorite-structure is assumed to be represented by a combination of the binaries and , and thus treated as a solution of (Pu/sub 4/3/O/sub 2/), (PuO/sub 2/), (UO/sub 2/), and either (U/sub 2/O/sub 4/./sub 5/) or (U/sub 3/O/sub 7/). The resulting equations well reproduce the large amount of oxygen potential-temperature-composition data for the mixed oxide system, all of which were also retrieved from the literature. These models are the first that appear to display the appropriate oxygen potential-temperature-composition and phase relation behavior over the entire range of existence for the phases. 39 refs., 10 figs., 3 tabs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5444006
• Report Number(s): CONF-840807-6; ON: DE85016389
• Resource Relation: Conference: Conference on chemical thermodynamics and 39. calorimetry conference, Hamilton, Canada, 13 Aug 1984
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
OXYGEN POTENTIAL
DATA COMPILATION
PLUTONIUM OXIDES
THERMODYNAMIC PROPERTIES
URANIUM OXIDES
BINARY MIXTURES
FLUORITE
HIGH TEMPERATURE
SOLID SOLUTIONS
TEMPERATURE DEPENDENCE
VERY HIGH TEMPERATURE
ACTINIDE COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM FLUORIDES
CALCIUM HALIDES
CHALCOGENIDES
DATA
DISPERSIONS
ENERGY
FLUORIDES
FLUORINE COMPOUNDS
FREE ENTHALPY
HALIDE MINERALS
HALIDES
HALOGEN COMPOUNDS
INFORMATION
MINERALS
MIXTURES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PLUTONIUM COMPOUNDS
SOLUTIONS
TRANSURANIUM COMPOUNDS
URANIUM COMPOUNDS
400702* - Radiochemistry & Nuclear Chemistry- Properties of Radioactive Materials