The time and temperature dependences of impurity diffusion were measured in detail for several bulk glasses over a wide temperature range. The Arrhenius diffusion relationship for Zr46.8Be27.5Ti8.2Cu7.5Ni10 in the high-temperature region could be described by:

D (m2/s) = 3.76 x 1010exp[-3.76(eV)/kT]

T.Zumkley, V.Naundorf, M.P.Macht, P.Fielitz, G.Frohberg: Materials Transactions, 2002, 43[8], 1921-30