The electrical conductivity and transfer number of the Ag-dissolved -phase in the super-ionic state were measured as a function of temperature and composition. It was noted that both Ag and Cu ions could be mobile, and that the activation energy for Ag ions was smaller than that for Cu ions. It was pointed out that the size of the Ag ion was more suitable for conduction than was that of the Cu ion, in this phase. As the ionic radius of the Ag ion was larger than that of the Cu ion, it was concluded that the so-called gate model could not explain the experimental data.

M.Kusakabe, Y.Ito, M.Arai, Y.Shirakawa, S.Tamaki: Solid State Ionics, 1996, 92[1-2], 135-8