LOCALIZED AND MOBILE ELECTRONS IN METAL-MOLTEN-SALT SOLUTIONS

At elevated temperatures (about 10(3) K) liquid alkali metal-alkali ha lide solutions transform continuously from the nonmetallic to the meta llic state (NM-M transition) as a function of the metal mole fraction x(M). In this study we present results of new experiments on spectrosc opic ellipsometry and on absorption spectroscopy across the transition regime. The data indicate that on both sides of the NM-M transition l ocalized and mobile electronic states may coexist