The diffusivities of Mn tracers were carefully re-measured. The activation energy for the substitutional diffusion of Mn2+ was 1.19eV. A high degree of association between divalent cations and vacancies at high temperatures was noted, and the activation energy for the jumping of Mn2+ into a cation vacancy was deduced to be 0.72eV. This was about 2.5 times the migration energy of the free unassociated vacancy.

Solute Migration by Interstitials and by Vacancies: Mn2+ and Cd2+ in AgCl. A.P.Batra, L.M.Slifkin: Journal of Physics - C, 1975, 8[18], 2911-22

 

Table 42

Diffusivity of 63Ni in AgCl

 

Temperature (C)

D (cm2/s)

440.5

2.21 x 10-9

416.4

7.60 x 10-10

392.8

2.47 x 10-10

373.8

1.25 x 10-10

350.2

4.27 x 10-11