FIM ATOM PROBE INVESTIGATION OF LONG PERIOD SUPERSTRUCTURES IN Cu3 ± xPd D. BLAVETTE, S. CHAMBRELAND, A. LOISEAU, J. PLANES et F. DUCASTELLE J. Phys. Colloques, 50 C8 (1989) C8-365-C8-370 DOI: 10.1051/jphyscol:1989862