ATOMIC RELAXATION IN MIXED-VALENT SYSTEMS DEDUCED FROM EXAFS SPECTROSCOPY N. WETTA, G. KRILL, P. HAEN, F. LAPIERRE, M.F. RAVET, C. GODART and F. HOLTZBERG J. Phys. Colloques, 47 C8 (1986) C8-965-C8-969 DOI: 10.1051/jphyscol:19868185