The activity
Fig. 3. Natural logarithm of the Cd activity vs. reciprocal temperature in four
two-phase fields.
Fig. 4. Natural logarithm of the Cd activity vs. reciprocal temperature for selected
compositions in the Ce13Cd58 phase.
Fig. 5. Partial molar enthalpy of cadmium in Ce13Cd58 along the homogeneity
range; standard state: Cd (l).
Fig. 6. Natural logarithm of the Cd activity in the Ce13Cd58 phase at 823 K; standard
state: Cd(l); symbols equal to Fig. 2.
Fig. 7. Natural logarithm of the cadmium and cerium activities vs. composition at
823 K.
B. Skołyszewska-Kühberger et al. / CALPHAD: Computer Coupling of Phase Diagrams and Thermochemistry 44 (2014) 14–20 19values were converted to a common temperature of 823 K
and are given for the composition range 48–100 at% Cd. Using
a literature value of ln aCe as integration constant, it was
possible to calculate Ce activities and integral Gibbs energies
of formation for the same temperature and composition range.
A minimum of ΔGCd¼ 37 kJ g-atom1 was obtained in the
phase CeCd