A large number of AgI-based fast-ion-conducting glasses were investigated by Kiodine

extended X-ray absorption fine structure spectroscopy measurements at

liquid nitrogen temperatures. A general correlation between the I-Ag distance

measured by X-ray absorption fine structure spectroscopy and the glass activation

energy for dc ionic conductivity was found: glasses with longer I-Ag distances

displayed higher ionic conductivity, regardless of the chemical composition of the

host glassy matrix. This behaviour could be related to the progressive increase of

the so-called pathway volume for ionic conduction.

Correlation Between I-Ag Distance and Ionic Conductivity in AgI Fast-Ion-

Conducting Glasses. A.Sanson, F.Rocca, C.Armellini, G.Dalba, P.Fornasini,

R.Grisenti: Physical Review Letters, 2008, 101[15], 155901