The diffusivity of 6Li was determined by using the capillary reservoir technique. It was found that the results could be described by:
D (m2/s) = 9.27 x 10-7 exp[-32.5(kJ/mol)/RT]
The activation energy for Li diffusion was much lower than that for F, and was slightly higher than that for electrical conduction.
N.Iwamoto, Y.Tsunawaki, N.Umesaki, H.Ohno, K.Furukawa: Faraday Transactions - II, 1979, 75[9], 1277-83
Table 166
Diffusion Parameters for Li in Doped Single Crystals of LiF
Dopant | Content (ppm) | Do (cm2/s) | Q (eV) |
Mg | 5 | 4.25 | 1.87 |
Mg, Mn | 17, 20 | 2.4 x 10-6 | 0.74 |
Mg | 82 | 6.0 x 10-6 | 0.77 |
Mg | 160 | 1.1 x 10-4 | 0.88 |
Mg | 320 | 1.8 x 10-3 | 0.92 |