It was found that the data for 110Ag diffusion, into the cold end of a 5N-purity single crystal which was subjected to a temperature gradient, were described by:

D (cm2/s) = 2.1 x 10-1 exp[-39.5(kcal/mol)/RT]

N.Q.Lam, S.J.Rothman, H.Mehrer, L.J.Nowicki: Physica Status Solidi, 1973, 57[1], 225-36