A sectioning technique was used to study the diffusion of 36Cl in solid solutions at 660C (table 90). An extension of phenomenological and kinetic theories was used to treat chemical diffusion, for the case of variable partial molar volumes. A comparison with the experimental results indicated a good agreement with Darken's expression for the chemical diffusion coefficient.

Chemical Diffusion in KCl-RbCl Solid Solutions. R.Lindström: Journal of Physics - C, 1973, 6[10], L197-201

 

Table 90

Diffusivity of 36Cl in the KCl-RbCl System at 660C

 

RbCl (mol%)

D (cm2/s)

0

2.27 x 10-10

10

2.92 x 10-10

20

3.75 x 10-10

30

4.59 x 10-10

40

5.43 x 10-10

50

6.00 x 10-10

60

6.28 x 10-10

70

6.50 x 10-10

80

6.49 x 10-10

90

6.35 x 10-10

100

6.15 x 10-10