Interaction of uranium based metallic fuels and lead coolant can lead to formation of intermetallic compounds of U-Pb system. To understand U-Pb interactions, it is important to know thermodynamic properties of intermetallic compounds present in this system, UPb3 and UPb. In the present work,enthalpy increment, heat capacity and enthalpy of formation of UPb3 intermetallic compound weredetermined. The enthalpy increment was determined by high temperature Calvet calorimeter and heatcapacity was determined using DSC. The heat capacity data was used to calculate thermodynamic parameters of the compound as a function of temperature. The enthalpy of formation at 843 K was determinedusing successive precipitation method, by direct reaction calorimetry. The enthalpy of formation at 843 K,from Pb(l) and U(l), was -28.9 kJ at-mol-1and after adjusting enthalpy increments of pure elements andcompound, the enthalpy of formation of the compound at 298 K, from Pb(s) and U(.alpha.) was found to be-20.0 kJ at-mol-1.
Compounds
#
Formula
Name
1
Pb3U
uranium trilead
2
Pb
lead
3
U
uranium
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.
Type
Compound-#
Property
Variable
Constraint
Phase
Method
#Points
POMD
1
Molar heat capacity at constant pressure, J/K/mol ; Crystal