Simple Generalised Bhatia-March-Flory Formula for Concentration Fluctuations in Liquid Mixtures

Abstract

Abstract The Bhatia-March-Flory formula for Scc describes concentration fluctuations in liquid binary mixtures in which the size ratio between the atoms is large. In this way, a successful application to Na-Cs has been achieved. On the other hand, Karaoglu and Young derived an expression for Scc that is applicable when the size ratio is near to unity but when atomic couplings are concentration-dependent. Thereby, Li-Mg was successfully described. In the present work, the two descriptions are combined to produce a simple formula probably of considerable generality and Sn-Zn and Na-Cd are thus successfully described.