Chronopotentiometry was used to investigate the diffusion of U4+ and U3+ in alkali chloride melts which contained 1 to 1.5wt%U. The results for U4+, at 920 to 1200K, could be described by:

log[D (cm2/s)] = -2.42-2040/T

The diffusivity of U4+ at 1100K was equal to 5.31 x 10-5cm2/s, and that of U3+ was 6.31 x 10-5cm2/s. M.V.Smirnov, V.V.Komarov, N.P.Borodina, Y.N.Krasnov: Elektrokhimiya, 1974, 10[5], 770-3

 

Table 138

Diffusivity of 88Y3+ in the Intrinsic Range of Pure NaCl

 

Temperature (C)

D (cm2/s)

781.2

7.15 x 10-9

767.1

6.05 x 10-9

762.6

5.91 x 10-9

745.1

5.07 x 10-9

720.6

3.43 x 10-9

698.7

2.65 x 10-9

685.2

2.34 x 10-9

665.4

1.72 x 10-9

648.1

1.34 x 10-9

634.7

1.10 x 10-9

620.4

8.80 x 10-10

615.8

8.30 x 10-10

592.7

5.60 x 10-10

558.5

3.60 x 10-10