Complexation of Neptunium(V) with Fluoride at Elevated Temperatures
Journal Article
·
· Journal of Thermal Analysis and Calorimetry
OSTI ID:961593
Complexation of neptunium(V) with fluoride at elevated temperatures was studied by spectrophotometry and microcalorimetry. Two successive complexes, NpO{sub 2}F(aq) and NpO{sub 2}F{sub 2}{sup -}, were identified by spectrophotometry in the temperature range of 10-70 C. Thermodynamic parameters, including the equilibrium constants and enthalpy of complexation between Np(V) and fluoride at 10-70 C were determined. Results show that the complexation of Np(V) with fluoride is endothermic and that the complexation is enhanced by the increase in temperature - a two-fold increase in the stability constants of NpO{sub 2}F(aq) and more than five-fold increase in the stability constants of NpO{sub 2}F{sub 2}{sup -} as the temperature is increased from 10 to 70 C.
- Research Organization:
- Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
- Sponsoring Organization:
- Chemical Sciences Division
- DOE Contract Number:
- AC02-05CH11231
- OSTI ID:
- 961593
- Report Number(s):
- LBNL-422E
- Journal Information:
- Journal of Thermal Analysis and Calorimetry, Journal Name: Journal of Thermal Analysis and Calorimetry; ISSN 1418-2874
- Country of Publication:
- United States
- Language:
- English
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