The diffusion of 59Fe was studied in icosahedral quasicrystals by using radiotracer and serial sectioning methods. It was found that the data could be described by:

D(cm2/s) = 1.63 x 102exp[-2.61(eV)/kT]

The quasicrystal data were not appreciably different to those for the related crystalline materials, where a vacancy-mediated diffusion mechanism was

generally thought to operate.

T.Zumkley, H.Mehrer, K.Freitag, M.Wollgarten, N.Tamura, K.Urban: Physical Review B, 1996, 54[10], R6815-8