Zeolite ITQ-1

A method for synthesizing a microporous crystalline material of zeolitic nature with an X ray diffraction pattern which is substantially concordant with that established in Tables I and II for the material as synthesized and after roasting, respectively, and with a chemical composition in roasted and anhydrous state represented by the empirical formula

• x(M.sub.1/n XO.sub.2):yYO.sub.2 :SiO.sub.2
• wherein x has a value smaller than 0.02;
• y has a value smaller than 0.04;
• M is H+ or a cation with charge +n;
• X is a chemical element with oxidation status of +3 and Y is a chemical element with oxidation status +4, and wherein the molar ratio (Si+Y):
• X is higher than 50,
• wherein a reaction mixture having a composition, in terms of oxide molar ratios. of
• X.sub.2 O.sub.3 /SiO.sub.2 =0-0.033
• ROH/SiO.sub.2 =0.1-0.5
• YO.sub.2 /SO.sub.2 =0-0.05
• H.sub.2 O/SiO.sub.2 =4-100
• wherein
• X is at least one trivalent element,
• Y is at least one tetravalent element other than Si;
• R is hydroxide of a R+ organic cation,
• the reaction mixture containing a source of SiO.sub.2, hydroxide of a R+ organic cation, a source of one or various tetravalent elements other than Si when Y is present, a source of one or various trivalent elements, and water, is subjected to heating with or without agitation to a temperature between 80 and 200.degree. C., until its crystallization is obtained,
• whereby no source of alkaline earth metal nor a source of alkali metals is added to the reaction mixture.