The diffusive behavior of H in 3N84-purity material was studied at 120 to 600C. The results could be described by:

120-300C:     D (cm2/s) = 9.0 x 10-5 exp[-0.068(eV)/kT]

300-600C:     D (cm2/s) = 5.0 x 10-4 exp[-0.106(eV)/kT]

G.Schaumann, J.Völkl, G.Alefeld: Physica Status Solidi, 1970, 42[1], 401-13