to 7 5 more preferably in the range of from 4 to 7 x is preferably chosen from ga fe b and or al more preferably al examples of suitable sources of x include any oxides hydroxides sulfates alkoxides and or halides of x y is preferably chosen from ti zr and or si more preferably si examples of suitable sources of y include any oxides alkoxides and or halides of y as well as quaternary ammonium compounds such as tetramethylammonium silicate and tetraethylorthosilicate typically any source of fluorine ions in the starting mixture can be used in the process of the present invention particularly suitable sources include hf and nh 4 f for reasons of safety nh 4 f is preferably used it is to be understood that the amount of nh 4 in the starting mixture is not critical and is in fact determined by the amount of ammonium salts used in preparation of the starting mixture nh4 may even be absent from the starting mixture as in the synthesis according to the present invention ionic forms of the organic template s used and any auxiliary organic compound may act as counter ion in the crystal lattice of the crystalline molecular sieve the organic template s and any auxiliary organic compound s may be removed from the large pore crystalline molecular sieve according to the present invention by calcining the molecular sieve at a temperature in the range of.