Thermal decomposition of curium tetrafluoride and terbium tetrafluoride
Journal Article
·
· J. Solid State Chem.; (United States)
The thermal decomposition of both curium and terbium tetrafluorides have been studied using mass spectrometry to monitor the effusate from a Knudsen cell containing the condensed fluoride. Curium tetrafluoride was found to decompose at 330-430/sup 0/C in vacuum. A Second Law enthalpy of 26.3 +/- 2 kcal/mole (at 370/sup 0/C) is derived from van't Hoff plots of results obtained for the decomposition reaction: CmF/sub 4/(s) ..-->.. CmF/sub 3/(s) + 1/2F/sub 2/(g). Decomposition fluorine pressures are derived and comparison is made with related studies of terbium tetrafluoride carried out in conjunction with the curium experiments. The results are compared both with data reported in the literature for lanthanide and actinide tetrafluorides and with predictions that have been made for CmF/sub 4/.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 7004142
- Journal Information:
- J. Solid State Chem.; (United States), Journal Name: J. Solid State Chem.; (United States) Vol. 73:2; ISSN JSSCB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400702* -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ACTINIDE COMPOUNDS
CHEMICAL REACTIONS
CURIUM COMPOUNDS
CURIUM FLUORIDES
DATA
DECOMPOSITION
DISSOCIATION
DISSOCIATION HEAT
ENERGY
ENTHALPY
EXPERIMENTAL DATA
FLUORIDES
FLUORINE COMPOUNDS
FORMATION FREE ENTHALPY
FORMATION HEAT
FREE ENTHALPY
HALIDES
HALOGEN COMPOUNDS
INFORMATION
MASS SPECTROSCOPY
NUMERICAL DATA
PHYSICAL PROPERTIES
PYROLYSIS
RARE EARTH COMPOUNDS
REACTION HEAT
SOLIDS
SPECTROSCOPY
TERBIUM COMPOUNDS
TERBIUM FLUORIDES
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TRANSPLUTONIUM COMPOUNDS
TRANSURANIUM COMPOUNDS
400702* -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ACTINIDE COMPOUNDS
CHEMICAL REACTIONS
CURIUM COMPOUNDS
CURIUM FLUORIDES
DATA
DECOMPOSITION
DISSOCIATION
DISSOCIATION HEAT
ENERGY
ENTHALPY
EXPERIMENTAL DATA
FLUORIDES
FLUORINE COMPOUNDS
FORMATION FREE ENTHALPY
FORMATION HEAT
FREE ENTHALPY
HALIDES
HALOGEN COMPOUNDS
INFORMATION
MASS SPECTROSCOPY
NUMERICAL DATA
PHYSICAL PROPERTIES
PYROLYSIS
RARE EARTH COMPOUNDS
REACTION HEAT
SOLIDS
SPECTROSCOPY
TERBIUM COMPOUNDS
TERBIUM FLUORIDES
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TRANSPLUTONIUM COMPOUNDS
TRANSURANIUM COMPOUNDS