On the Nature of Bi in Molten Bi-BiI3 Mixtures and In in Molten In-InI3 Mixtures

The nature of Bi in molten Bi-Biia mixtures and In in molten In-Inia mixtures is surveyed on the basis of static properties and macroscopic transport coefficient (phase diagram and d.c. conductivity). It is shown that information at the microscopic level due to techniques of pulsed neutron scattering, Raman scattering and NMR can account for their nature. From pulsed neutron scattering data preferred Bi-Bi pair-correlation or polybismuth species is proposed for Bi..It-z melts even at the I-rich side below about 40 at% Bi. The localized electronic states around the Fermi level may be established and conduction takes place via hopping of electrons from one trapping site to another for these solutions. The strong concentrationdependence of the first peak distance, which is related to preferred Bi-Bi distance and observed over the range of 0.4