Study of NH4-Y zeolites dealuminated by (NH4)2SiF6 CL Léger, B Herreros, MA Hepp, J Thoret, C Potvin, PP Man and J Fraissard J. Chim. Phys., 91 (1994) 916-923 Published online: 29 May 2017 DOI: 10.1051/jcp/1994910916