Abstract
The synthesis of zeolite omega, the synthetic analog of mazzite, was carried out by using commercial reagents and a low amount of tetramethylammonium template. The use of a slow-release source of aluminium allowed to avoid the formation of a precursor gel and to concentrate the nucleation at the beginning of the synthesis. The rates of crystal growth in radial and axial direction depends on the alkalinity and the aluminium concentration. The changes of the aspect ratio and morphology of the crystals can be accounted for by the relative growth rates of different crystal faces.