STUDY OF SMALL DISTORSIONS IN Bi12MO20 OXIDES BY SIMPLE EXAFS TRANSMISSION TECHNICS M.H. TUILIER, M. DEVALETTE, N. KHACHANI, M. DEXPERT et P. LAGARDE J. Phys. Colloques, 47 C8 (1986) C8-741-C8-744 DOI: 10.1051/jphyscol:19868140