PHASE RELATIONS IN THE Cu8GeS6–Ag8GeS6 SYSTEM AND SOME PROPERTIES OF SOLID SOLUTIONS

Phase equilibria in the Cu8GeS6–Ag8GeS6 system were experimentally investigated by means of differential thermal analysis, powder X-ray diffraction techniques, and electromotive force (EMF) measurements of concentration chains with Cu4RbCl3I2 solid electrolyte. The phase diagram and some composition–property graphs for title system were plotted. We found that continuous series of solid solutions were formed between high-temperature modifications of starting compounds of the system. Formation of solid solutions causes decreasing of the polymorphic transitions' temperature for both compounds