enthalpies of phase transitions and heat capacity were measured by differential scanning calorimetry for CeBr3 as well as the Rb3CeBr6 and CS3CeBr6 Congruently melting compounds. A polynomial heat capacity dependence with respect to temperature was used to fit the experimental data. By combining these results with the entropy at 298.15 K, temperatures, and enthalpies of phase transitions, the thermodynamic functions of CeBr3, Rb3CeBr6, and CS3CeBr6 were calculated up to T = 1100 K.