Effect of hydrostatic pressure on the electrical conductivity of Ag3SBr and β-Ag3SI

Abstract

The electrical conductivity of Ag₃SBr and β-Ag₃SI has been measured as a function of hydrostatic pressure up to 3.15 × 10⁸ N m^–2 in the temperature range 293 to 373 K. The activation volumes obtained at 303 K are – 1.2 ± 0.6 cm³ mol^–1 for Ag₃SBr and – 2.3 ± 0.4 cm³ mol^–1 for β-Ag₃SI. For Ag₃SBr the activation volume becomes more positive as temperature rises whereas for β-Ag₃SI it becomes more negative with increasing temperature.