Muon diffusion studies have been performed in the fcc metals Pt, Pd an
d Pb. The muons start to diffuse above 100K in Pt, while they appear t
o be mobile at all temperatures down to 15 K in Pd. The data on Pb sug
gest mobility above T = 30 K. These new data extend the range of fcc m
etals available for systematic comparisons of muon diffusion.