STRUCTURE AND CRYSTALLIZATION OF FLUOROZIRCONATE GLASSES. STUDY BY THE FLUORESCENCE OF Pr3+ IONS M. FERRARI, J.L. ROUSSET, A. BOUKENTER, A. BOYRIVENT, E. DUVAL et A. MONTEIL J. Phys. Colloques, 48 C7 (1987) C7-463-C7-465 DOI: 10.1051/jphyscol:19877110