Phase behavior in fluid and solid mixtures at high pressures

Abstract

Following the description of a classification scheme for fluid phase diagrams in two-component systems, based on boundary lines in pressure-temperature space, the three-dimensional features of several important classes of pressure-temperature-composition (PTX) phase diagrams for two-component mixtures at high pressures (up to 100 kbar) are described. The discussion includes two-and three-phase equilibria between gas, liquid and solid phases, with emphasis on the qualitative effects of pressure on these systems and the picture of continuity between different types of critical and three-phase phenomena that has emerged from studies at high pressures. © 1989 IUPAC.