GELS IN THE SYSTEM CaO-Al2O3-SiO2 PREPARATION AND STRUCTURAL EVOLUTION F. Pancrazi, J. Phalippou, F. Sorrentino et J. Zarzycki J. Phys. Colloques, 43 C9 (1982) C9-279-C9-283 DOI: 10.1051/jphyscol:1982952