Partial structure factors and atomic dynamics in conformal solutions

Abstract

The model of conformal solutions, introduced to study the thermodynamics of liquid mixtures by Longuet-Higgins, is used to calculate the partial structure factors S ij ( q ) of a binary liquid. Explicit expressions are given, in terms of the pair interaction and the radial distribution function for the reference liquid, for the number-concentration structure factors of the mixture. Results are also obtained for transport properties, in particular for interdiffusion and thermal diffusion ratio. Finally some relevant experiments are proposed.