Predicting the liquid-vapor critical point from the crystal anharmonicity

A 'universal' dependence is predicted of the reduced critical parameters (t emperature, density, and pressure) on the crystal anharmonicity. The model, which employs the 'universal' zero-temperature equation of state in a vers ion of fluid perturbation theory, is apparently the first to predict correc tly the critical temperature and density for both the rare gases and Alkali metals.