Phase Relations in the Na, K//Cl, SO₄, CO₃-H₂O Quinary System at 35 °C

The phase equilibria in the quinary Na, K//Cl, SO₄, CO₃-H₂O system at 35 °C were determined, and a total phase equilibria diagram of the system was constructed by means of the translation method. Six points saturated with four solid phases, 19 curves saturated with three solid phases, and 21 fields saturated with two solid phases were determined in the system. Structures of dry-salt diagrams for the parts saturated with each of the nine solid phases were extracted from the total phase equilibria diagram of the system. The obtained results for the parts saturated with halite and sylvite agree well with the available literature data and verify the rest of the data obtained in this work.