CHALCOGENIDE AND OXYCHALCOGENIDE GLASSES : EVOLUTION OF THE GALLIUM SURROUNDING WITH THE OXYGEN CONTENT S. BENAZETH, M. H. TUILIER, H. DEXPERT, M. GUITTARD et D. CARREJ. Phys. Colloques, 47 C8 (1986) C8-419-C8-422DOI: https://doi.org/10.1051/jphyscol:1986884