The Solid-Liquid Equilibrium in Argon

The method of investigating the equilibrium between solid and liquid phases, outlined in a previous paper, has been applied to argon. (In this method the intersections of the curves for the thermodynamic quantities T(∂S/∂V)T and (∂E/∂V)T+P, plotted as functions of the volume, are used to determine the conditions of equilibrium of the system.) Curves are found for the functions (∂S/∂V)T and (∂E/∂V)T, assumed dependent on volume and independent of temperature, which can reproduce with reasonable accuracy most of the melting parameters of argon at high pressures. The significance of these curves is discussed.