Electronic and Ionic Interactions Analyzed through Concentration and Charge Fluctuations in KxKCL(1−x) Mixtures

A deeper insight into short, medium and long ranges behaviour of partial structure factors (PSF) measured in the rich metal domain of KxKCL(l-x) solutions as a function of composition shows up that structural changes are characterised by a non-linear perturbation of the screening properties prevailing in the pure metal liquid. Pseudopotential theory for describing the anion-conduction electron interaction, and perturbation calculations must be dropped. The correlation between long wavelength limits of PSF and thermodynamic is particularly difficult to unravel at k = 0. The structural changes observed in neutron diffraction indicate that a better understanding of these correlations consists in treating the correlation between charge fluctuations and atomic concentration fluctuations.