The program package, “PEQ”, for mineral phase equilibrium calculations with a personal computer

Abstract

“PEQ” is a QuickBASIC program package for the construction of mineral phase equilibrium diagrams such as P-T, T-X_CO2, P-X_CO2, lnf_O2-T and μ_x-μ_y diagrams using a personal computer. The thermodynamic datasets for minerals of Helgeson et al. (1978) and Holland and Powell (1990) are incorporated into the program. The non ideal mixing of H₂O and CO₂ can also be taken into account. Some examples of the construction of phase diagrams using “PEQ” are given.