A serial-sectioning investigation was made of the effect of hydrostatic pressures upon the diffusion of 36Cl in single crystals (table 76). The data for pressures of 1 to 16.5kbar, at a temperature of 745C, indicated an activation volume of 11.8cm3/mol. Those for pressures of 1 to 17kbar, at a temperature of 685C, indicated an activation volume of 11.7cm3/mol, and those for pressures of 10.8 to 17kbar, at a temperature of 797C, indicated an activation volume of about 14cm3/mol.

H.W.Schamp: US Atomic Energy Report TID-23874, 1967

 

 

Table 76

Effect of Temperature and Pressure upon the

Self-Diffusion of 36Cl in Single Crystals of KCl

 

Temperature (C)

Pressure (kbar)

D (cm2/s)

745

1

4.80 x 10-10

744

6.9

1.46 x 10-10

743

8.2

1.73 x 10-10

745

12.0

9.57 x 10-11

747

16.5

4.53 x 10-11

685

1

1.78 x 10-10

685

10.3

3.22 x 10-11

685

10.3

3.59 x 10-11

688

16.1

1.62 x 10-11

688

17.1

1.20 x 10-11

796

10.85

1.73 x 10-10

797

12.0

1.11 x 10-10

797

13.7

1.39 x 10-10

797

13.7

1.41 x 10-10

799

16.0

1.41 x 10-10

799

16.0

1.40 x 10-10

797

17.0

1.75 x 10-10