THE STRUCTURE OF THE Cu(111) (√3 x √3) R30°-Cl SURFACE : A COMBINED SEXAFS AND PHOTOELECTRON DIFFRACTION STUDY M.D. CRAPPER, C.E. RILEY, P.J.J. SWEENEY, C.F. McCONVILLE, D.P. WOODRUFF et R.G. JONES J. Phys. Colloques, 47 C8 (1986) C8-533-C8-538 DOI: 10.1051/jphyscol:19868100