By using a special cell, the conductivity was measured under hydrostatic pressures of up to 5000atm. From the results, it was deduced that the activation volume for the process was close to the molar volume of the Ag ion; as calculated using the Goldschmidt radius.

I.Grincourt, M.Henault, M.Duclot, J.L.Souquet: Physics and Chemistry of Glasses, 1996, 37[6], 236-8