DIFFERENTIAL ANOMALOUS X-RAY SCATTERING STUDY OF AN UNSUPPORTED Ni-Mo SULFIDE CATALYST J.M. TONNERRE, D. RAOUX, J.C. DE LIMA, H. TOULHOAT et D. ESPINAT J. Phys. Colloques, 48 C9 (1987) C9-1137-C9-1140 DOI: 10.1051/jphyscol:19879208