Mechanism of ion transfer in structure-disordered copper and silver chalcogenides

Copper and silver selenides and tellurides and their solid solutions are studied. Parameters of ion transfer are measured; the solid solution structure is refined using x-ray and neutron diffraction analysis; the lattice dynamics is studied using the neutron inelastic scattering and NMR; and the short-range order is studied using EXAFS. Based on the summarizing of the experimental results obtained, in aggregate with literature data, a physical mechanism of ion transfer in mixed ion-electron conductors is suggested.