abstract |
The invention concerns a crystalline solid designated IM-18 which has the X-ray diffraction diagram given below. Said solid has a chemical composition expressed by the empirical formula: mXO 2 :nGeO 2 :pZ 2 O 3 :qR:sF:wH 2 O, in which R represents one or more organic species, X represents one or more tetravalent element(s) other than germanium, Z represents at least one trivalent element and F is fluorine. |