Phase Equilibria in the Na,K,Mg,Ca||SO_4,Cl-H_2O System at 25 deg C in the Mirabilite and Thenardite Crystallization Regions

摘要

Phase equilibria in the Na,K,Mg,Ca||SO_4,Cl-H_2O System at 25 deg C in the mirabilite Na_2SO_4 o 10H_2O and thenardite Na_2SO_4 crystallization regions are studied using the translation method. Mirabilite and thenardite, which are the equilibrium solids of the system at 25 deg C, are involved in the formation of one and two invariant points, four and seven monovariant curves, and six and nine divariant fields, respectively. Fragments of the phase equilibrium diagram of the title system are designed in the mirabilite and thenardite crystallization regions.