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

Abstract

Phase equilibria in the NdBr 3 -MBr binary systems (M = Na, K) were established by differential scanning calorimetry. The system with NaBr is a simple eutectic system with two compounds that decompose in the solid state (NaNdBr 4 at 603 K and Na 3 NdBr 6 at 580 K). In the system with KBr, three stoichiometric compounds exist. First (K 3 NdBr 6 ) is formed from KBr and K 2 NdBr 5 at 680 K and melts congruently at 918 K. Second (KNd 2 Br 7 ) melts congruently at 814 K. Third compound (K 2 NdBr 5 ) melts incongruently at 822 K.

Phase equilibria in the CeI3–CsI binary system

“…Numerous studies have been carried out to investigate thermochemistry of rare-earth chlorides and bromides and their binary systems with the alkali halides [8][9][10][11][12][13][14][15][16][17][18]. However, the knowledge of rare-earth iodides is still scanty.…”