摘要 |
The invention relates to a crystallized solid, referred to by the name IM-12, which exhibits an x-ray diffraction diagram as provided below. Said solid exhibits a chemical composition that is expressed on an anhydrous base, in terms of oxide moles, by the formula XO<SUB>2</SUB>:m YO<SUB>2</SUB>:p Z<SUB>2</SUB>O<SUB>3</SUB>:q R<SUB>2/n</SUB>O, where R represents one or more cation(s) of valence n, X represents one or more different tetravalent element(s) of germanium, Y represents germanium, and Z represents at least one trivalent element. |