Electrical properties of the Ag6PSe5X (X=Cl, Br, I) argyrodites Original Research Article

The total electrical conductivities at room temperature of Ag6PSe5Cl, Ag6PSe5Br, and Ag6PSe5I were found to be 2.0×10−4, 5.6×10−4, and 6.8×10−4 S/cm, respectively. In the chloride and iodide compounds, the electronic contribution comprises approximately 1% of the total conductivity, although it exceeds 10% of the total conductivity in the bromide compound. Ag6PSe5Cl and Ag6PSe5Br exhibit purely Arrhenius behavior throughout the temperature range 150–300 K. Ag6PSe5I exhibits a second-order anomaly in electrical conductivity at 324 K.