With the increase in silica:alumina ratio the hydrothermally crystd. zeolites in TMEDA (tetramethylethylenediamine)-Na2O-SiO2-Al2O3-H2O system were in the following order: Md(mordenite), TMEDA-Md, ZSM-35, ZSM-5, ZSM-39, and a novel zeolite CF-3. With respect to the composition, properties, and crystal structure of zeolites and the configuration of the template mol., the structure-directing effects of the template are discussed, which change from the combined effect of a cation balancing of the framework charge and channel occupation to the effect of cages occupation.

Key words: WATER, ALUMINIUM OXIDE, ZEOLITE, CRYSTAL STRUCTURE, X-RAY DIFFRACTION ANALYSIS, SILICON OXIDE, PHASE, SODIUM OXIDE, HYDRO-THERMAL REACTION, ETHANEDIAMINE P