The diffusion of S in single crystals, at 372 to 675C, was investigated by means of secondary ion mass spectrometry. The diffusion was shown to be dominated by 2 mechanisms, with associated diffusivities which were described by:

D (cm2/s) = 2.5 x 10-8 exp[-1.06(eV)/kT]

and

D (cm2/s) = 4.9 x 10-4 exp[-1.7(eV)/kT]

D.W.Lane, G.J.Conibeer, D.A.Wood, K.D.Rogers, P.Capper, S.Romani, S.Hearne: Journal of Crystal Growth, 1999, 197[3], 743-8

The best linear fits to the solute diffusion data ([26] to [45]) yield:

Cu: Ln[Do] = 0.21E – 14.3 (R2 = 0.06); Hg: Ln[Do] = E – 38.8 (R2 = 0.98);

In: Ln[Do] = 0.40E – 16.9 (R2 = 0.91); Na: Ln[Do] = 0.67E – 18.1 (R2 = 0.99)