Experiments on Expanded Metals in the Metal-Nonmetal Transition Region

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Abstract
Experiments on fluid metals near the liquid-vapour critical points have shown that there are profound changes in their electronic structure in that region. A metal-nonmetal transition occurs with decreasing density. In the present paper selected recent experimental results including the equation of state, electrical, dielectric and optical properties are used to demonstrate that the strong variation in the electronic structure in course of the metal-nonmetal transition which manifests itself in a correspondingly strong thermodynamic-state-dependence of the effective interparticle interaction noticeably influences the features of the vapour-liquid phase transition of metals.

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