A serial sectioning technique was used to study the diffusion of 131I in material which contained about 4ppm of impurities (table 9). The Arrhenius plots were curved. The I required the same temperature-dependent activation energy as that for Br.

Impurity Halide Diffusion in Silver Chloride and Silver Bromide. A.P.Batra, L.Slifkin: Journal of Physics and Chemistry of Solids, 1969, 30[6], 1315-20

 

Table 9

Diffusion of 131I in AgBr

 

Temperature (C)

D (cm2/s)

415.0

7.82 x 10-10

397.7

2.81 x 10-10

383.4

1.14 x 10-10

363.3

3.63 x 10-11

344.8

1.24 x 10-11

322.0

3.09 x 10-12

302.2

9.20 x 10-13

292.4

5.08 x 10-13