P–T phase diagram at various concentrations for the NH4BrxCl1−x system

We calculate here using the mean field theory, the phase-line equations for the γ–β, δ–β and δ–γ phase transitions in the NH4BrxCl1−x system. We fit our P–T phase diagrams calculated at various concentrations to the experimental data for this crystalline system. Our results show that there is a good agreement between our calculated and experimentally observed phase diagrams for the NH4BrxCl1−x system.