Akademik Məlumat İdarəetmə Sistemi
Chemical Problems, vol.23, no.3, pp.375-387, 2025 (Scopus)
The present work demonstrates the thermodynamic study of copper arsenides using electromotive force measurements with a solid Cu+ conductive electrolyte, Cu4RbCl3I2, within the temperature range of 300–440 K. Measurements were performed using the equilibrium samples from the Cu3As + As, Cu3As + Cu8As, and Cu8As + (Cu) two-phase regions of the Cu-As system. The phase compositions of all samples were controlled using the powder X-ray diffraction method. The partial molar functions of copper in alloys, as well as the standard thermodynamic functions of formation and standard entropies of the Cu3As, Cu8As compounds, as well as, the Cu094As006 solid solutions based on copper, were calculated. A thermodynamic study of the Cu8As compound and the Cu094As006 solid solution has been carried out for the first time in the current contribution. Thermodynamic properties for the Cu3As compound obtained in this work have been analyzed compared with the available literature data.