in kristallinisches material 12, and its production method

摘要

The invention relates to a crystalline solid, designated under the name im - 12, which has an x ray diffraction diagram such as is given below 1 -. The said solid has a chemical composition, expressed in an anhydrous base, in terms of moles of oxides, by the formula xo2: m yo2: p z2o3: r2 / n, where r represents one or several cation (s) of valence n, x represents one or more tetravalent element (s) (s) that is different (s) of the germanium, y represents the germanium, z represents at least one trivalent element.