Thermodynamic and transport properties of the PrBr3–MBr binary systems (M=Li, Na)

Instrumentation and calibration of the Calvet calorimeter

“…Kapała (Aldrich pure for analysis), KBr, RbBr and CsBr (Merck suprapure), CsCl (Alfa Aesar pure for analysis), PrBr 3 was prepared before [2]. The metallic gallium (Aldrich 99.99% trace metals basis) was used as a reference material.…”

Thermodynamic and transport properties of the PrBr3–RbBr binary system

“…The main steps of this synthesis include: dissolution of oxide in hot concentrated HBr acid, crystallisation of PrBr3·nH2O, its dehydration in the presence of ammonium bromide, sublimation of NH4Br, melting of crude PrBr3 and its purification by distillation under reduced pressure (∼0.1 Pa) in a quartz ampoule at 1150 K. The details of this synthesis were described elsewhere [13]. PrBr3 prepared in this way was of a high purity -minimum 99.9%.…”

“…Experiments were conducted at heating and cooling rates ranging 1-5 K min −1 . Details of experimental procedures and apparatus calibration were given previously [13]. The maximum relative experimental error on enthalpy of phase transition did not exceed 1%.…”

“…PrBr 3 -based bromide systems follow this trend. The binary systems with LiBr and NaBr are of simple eutectic-type [13] (IP M+ /IP Pr3+ = 0.456 and 0.330, respectively). In the system with KBr [14], the congruently melting compound, K 3 PrBr 6 and two incongruently melting compounds (K 2 PrBr 5 and KPr 2 Br 7 ) were found (IP K+ /IP Pr3+ = 0.244).…”

Thermodynamic properties of the NdBr3–MBr binary systems (M = Na, K)

“…These investigations are part of our general research program targeted at determination of unknown and verification of existing phase diagrams of lanthanide halide-alkali metal halide systems. Previously, we reported the results of investigations concerning the phase diagrams of the CeBr 3 -MBr (M = alkali metal) [24][25][26][27][28], PrBr 3 -MBr [29][30][31][32], TbBr 3 -MBr [33][34][35] and DyBr 3 -MBr [36][37][38][39] binary systems. The present paper is a continuation of this ongoing extensive program.…”