Local order and concentration fluctuations in K-Pb and Rb-Pb alloys

The concentration fluctuations in the long wavelength limit Scc(0), short range order parameter and free energy of mixing of K-Pb and Rb-Pb alloys have been studied within the framework of the quasi-chemical theory. It is observed that the simple model could be used to shed more insight into the nature of chemical ordering that exists in such strongly compound forming binary alloys. (author). 19 refs, 6 figs, 1 tab