Anomalies are observed in measurements of electromotive force and electric conductivity measurements of solid oxide electrolyte cells involving Cr(s)-Cr2O3(s) electrode. Transformation in Cr(s)-Cr2O3(s) system at about 1 653 K is suggested to explain the anomalies mentioned above on the basis of measured temperature dependencies of electromotive force and total and electronic conductivities of the cells.
