Phase diagram and electrical conductivity of the CeBr3–RbBr binary system

Phase equilibrium in the CeBr3–RbBr binary system was established from differential scanning calorimetry (DSC). This system has three compounds Rb3CeBr6, Rb2CeBr5 and RbCe2Br7 and two eutectics located at (x = 0.141; 858 K) and (x = 0.528; 762 K), respectively. Rb3CeBr6 forms at 614 K, undergoes a solid–solid phase transition at 695 K and melts congruently at 966 K. Rb2CeBr5 melts incongruently at 830 K and RbCe2Br7 at 741 K. The electrical conductivity of CeBr3–RbBr liquid mixtures was measured down to temperatures below solidification over the whole composition range. Results obtained are discussed in term of possible complex formation.