Two speciesonideal solution model for amorphous/amorphous phase transitions

摘要

A simple macroscopic thermodynamic model for first order transitions between two amorphous phases in a one componetn liquid is reviewed, augmented and evaluated. The model presumes the existence in the liquid of two species,whose concentrations are temperature and pressure dependent and which form a solution with large, positive deviations from ideality. Application of the model to recent data indicates that water can undergo an amorphous/amorphous phase transition below a critical temperature T_c of 217K and above a critical pressure P_c of 380 atm.