Rare-gas liquids: Equation of state and reduced-pressure, reduced-bulk-modulus, and reduced-sound-velocity functions

This paper is concerned with verification of the applicability of the Vinet et al. universal equation of state to the liquid phase of the rare-gas elements under pressure. As previously observed in solids and liquid metals, to a good approximation, in the absence of phase transitions, plots of the logarithms of the reduced pressure function H, of the reduced sound velocity v, and of the reduced bulk modulus b, are all linear functions of 1-X over the entire experimental pressure range; X==(V/V₀)^1/3. We observe that the results obtained on the rare-gas liquids are comparable in accuracy to those obtained in our previous work on solids and liquid metals.