The observation of Condon domains in white tin, obtained by muon spin rotat
ion spectroscopy, is reported. The experiment at T=0.08 K for external magn
etic fields between 1 and 2.6 T perpendicular to the (100) crystal plane re
veals two ''active" extremal cross sections of the Fermi surface, leading t
o domain formation with two different de Haas-van Alphen frequencies F(tau
(1)(2)) and F(pi (1)(2)) at different field ranges and having a crossover r
egion with no periodicity.