The diffusion of Fe2+ ions was found, using the serial sectioning technique, to proceed substitutionally at temperatures ranging from 232 to 449C. The results (table 49) could be described by:

D (cm2/s) = 15.1 exp[-1.27(eV)/kT]

Assuming that the activation enthalpy for Fe2+ migration was 0.6eV, the association enthalpy was deduced to be about 0.07eV for Fe2+ vacancy complexes.

D.L.Foster, A.L.Laskar: Physica Status Solidi A, 1975, 29[1], 167-72

 

 

Table 49

Diffusivity of Fe in Pure AgCl

 

Temperature (C)

D (cm2/s)

448.8

2.11 x 10-8

441.2

1.66 x 10-8

411.3

5.46 x 10-9

387.9

2.53 x 10-9

373.2

1.63 x 10-9

343.0

6.13 x 10-10

310.8

1.36 x 10-10

296.2

8.86 x 10-11

278.8

3.96 x 10-11

256.5

1.00 x 10-11

232.2

7.59 x 10-11