an aluminosilicate gel containing an st structuring agent whose composition is suitable for crystallization into a zeolite of the faujasite structural family is prepared . the gel then undergoes crystallization in order to form a zeolite precursor which consists of the zeolite containing the st structuring agent in its cavities and channels , the zeolite being produced through the calcination of the precursor . the st structuring agent consists of at least one compound from the alkylene polyoxides of formula ## str1 ## in which r and r &# 39 ;, identical or different , each represents h or an alkyl radical in c 1 to c 4 , x designates h or oh , m is equal to 2 or 3 and can differ from one pattern to another , and n is a number from 1 to 12 . the zeolites thus obtained have a si : al ratio which is greater than 1 and which can go beyond 3 , and show a cubic symmetry . the zeolites can be used , directly or after cation exchange , as adsorbants or as catalyst constituents .