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 65).

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

 

 

Table 65

Diffusivity of Co2+ Ions in CsCl Melts

 

CoCl2 (/cm3)

Temperature (C)

D (cm2/s)

1.420 x 105

700

0.77 x 10-5

1.670 x 105

700

0.73 x 10-5

1.761 x 105

700

1.66 x 10-5

1.365 x 105

806

1.02 x 10-5

1.395 x 105

806

1.75 x 10-5

1.480 x 105

806

2.01 x 10-5