A serial sectioning technique was used to study the diffusion of 131I in material which contained about 5ppm of impurities (table 50). The I diffusion required the same activation energy as that for Cl diffusion. The data for temperatures ranging from 307 to 448C could be described by:

D (cm2/s) = 167 exp[-36.2(kcal/mol)/RT]

A.P.Batra, L.Slifkin: Journal of the Physics and Chemistry of Solids, 1969, 30[6], 1315-20

Table 50

Diffusion of 131I in AgCl