The ionic conductivity of AgI–montmorillonite composites was studied at 35 to 520C. Composites with montmorillonite contents as low as 0.89w/o exhibited a maximum which was about 8 times the conductivity of pure β-AgI at low temperatures. These results were attributed to the large surface area of the clay, and were qualitatively explained on the basis of the stabilization of the low-temperature high-conductivity metastable γ-phase of AgI.

Ionic Conductivity in Montmorillonite-Doped Silver Iodide. J.C.Bazán, N.J.García, J.A.Dristas, C.V.Spetter: Solid State Ionics, 2004, 170[1-2], 57-61