Three transition times were observed during the chronopotentiometric study of CoCl2 in fused alkali chloride solutions. The first and third times were diffusion-controlled and did not coexist. The diffusion coefficients which were calculated from the chronopotentiometric data were smaller than those predicted from theoretical formulae by using the radius of Co2+. This behavior was attributed to the fact that Co2+ was not the ion which was being diffused (table 78).

Y.K.Delimarskii, V.F.Grishchenko, N.I.Parkhomenko: Ukrainski Khimicheski Zhurnal, 1975, 41[11], 1123-7

Table 78

Diffusivity of Co2+ Ions in KCl Melts at 700C