CRYSTALLINE SOLID IZM-2 AND METHOD FOR THE PREPARATION THEREOF

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The invention relates to a crystalline solid, denoted under the name IZM-2, which has an X-ray diffraction pattern as given below. Said solid has a chemical composition expressed, on an anhydrous basis, in terms of moles of oxides, by the following general formula : XO2 : aY2O3 : bM2/nO, where X is at least one tetravalent element, Y is at least one trivalent element and M is at least one alkali metal and/or alkaline-earth metal of valency n, a and b respectively representing the number of moles of Y2O3 and M2/nO and a is between 0 and 0.5 and b is between 0 and 1.