Collect. Czech. Chem. Commun. 1990, 55, 1175-1183

Metastability of the system potassium chloride-potassium bromide-water

Karolina Papazova-Denchevaa, Jaroslav Nývltb, Vladimír Pekárekb and Milan Šípekc

a Sofia University, Sofia 26, Bulgaria
b Institute of Inorganic Chemistry, Czechoslovak Academy of Sciences, 160 00 Prague 6, Czechoslovakia
c Prague Institute of Chemical Technology, 166 28 Prague 6, Czechoslovakia


The metastable zone width has been determined for pure KCl-H2O and three compositions of the ternary system KCl-KBr-H2O at temperatures close to 35 and 40 °C. In agreement with literature it was confirmed that there are two different regions of solid solutions in the system KCl-KBr-H2O. The data on metastable zone width show a different crystallization behaviour of both of the solutions: the values of critical nucleation parameters calculated from the measurements exhibit a distinct asymetry which may be connected with different radii of the Cl- and Br- ions.