A direct experimental investigation was made of the dynamics of phason defects in an icosahedral quasicrystal. The Arrhenius parameters for the diffusion of phasons were deduced to be 4.28eV and 4 x 1021/s.

Dynamics of Phason Diffusion in Icosahedral Al–Pd–Mn Quasicrystals. M.Feuerbacher, D.Caillard: Acta Materialia, 2006, 54[12], 3233-40