A method for enhancing the catalytic activity of a porous inorganic crystalline composition comprising 98 mole percent or more SiO2 and 2 mole percent or less oxides of {HEAD ~ at least one initial lattice metal} selected from those of Groups IIIB, IVB, {TAIL ~ VB}, VIB, VIIB, VIII, IIIA, IVA and VA of the Periodic Table of the Elements and having an anhydrous anionic framework molar composition expressed by the formula 
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A method for enhancing the catalytic activity of a porous inorganic crystalline composition comprising 98 mole percent or more SiO2 and 2 mole percent or less oxides of { HEAD ~ at least one initial lattice metal } selected from those of Groups IIIB , IVB , { TAIL ~ VB } , VIB , VIIB , VIII , IIIA , IVA and VA of the Periodic Table of the Elements and having an anhydrous anionic framework molar composition expressed by the formula
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