S. Amokrane et C. Regnaut, FREE-VOLUME FRACTION IN HARD-SPHERE MIXTURES AND THE OSMOTIC SPINODALCURVE, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 53(2), 1996, pp. 1990-1993
The sensitivity of the theoretical spinodal curve deduced from the osm
otic equilibrium equation for asymmetric hard-sphere mixtures is exami
ned by evaluating the free-volume fraction from three expressions of t
he excess chemical potential. The conditions for predicting a reductio
n of the stability domain with increasing asymmetry are discussed. The
necessity of modifying this approach in the presence of attractions b
etween the smaller species is underlined.