Square-well self-diffusion coefficients in liquid binary alloys of alkali metals within the mean spherical approximation

Abstract The concentration dependencies of the self-diffusion coefficients in liquid Na–K and K–Cs alloys at T = 373 K are calculated in the framework of the linear trajectory approximation in conjunction with the square-well (SW) model treated by the mean spherical approximation in the semi-analytical representation. It is shown that this approach allows to achieve a good description of diffusion properties for liquid binary metal alloys at the same values of the SW parameters that lead to a good description of the structure and entropy for alloys under consideration.