The conductivity was measured as a function of pressure. It was shown that the activation volume increased appreciably with increasing temperature and decreased with increasing pressure (table 13). The large increase in the activation volume as a function of temperature was attributed to the onset of a gradual transition to a solid electrolyte phase.

B.E.Mellander, D.Lazarus: Physical Review B, 1984, 29[4], 2148-52

Table 13

Activation Volumes of AgBr as a Function of Pressure and Temperature