The invention relates to a microporous crystalline material which is
characterised in that it has the following chemical composition in the
calcined state: X.sub.2O.sub.3: n YO.sub.2: m GeO.sub.2, wherein (n+m) is
equal to at least 5, X is a trivalent element, Y corresponds to one or
more tetravalent elements other than Ge and the Y/Ge ratio is greater
than 1. Moreover, in the synthesised form without calcination, said
material has an X-ray diffraction pattern in which the main lines thereof
are as follows: (1), in which (mf) represents relative intensity of
between 80 and 100, "d" represents relative intensity of between 20 and
40 and "md" represents relative intensity of between 0 and 20, which is
calculated as a percentage with respect to the most intense peak. The
invention also relates to the method of preparing said material and the
use thereof in the conversion of food products comprising organic
compounds.