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A new, large pore zincosilicate denoted CIT-6 with the framework topology of zeolite beta has been synthesized from reaction mixtures containing Li+, Zn2+ and tetraethylammonium hydroxide (TEAOH) as a structure-directing agent (SDA). The effects of the concentrations of Li+, Zn2+ and TEAOH on the preparation of CIT-6 are investigated and it is shown that there are critical ranges in concentration...
The synthesis of the zincosilicate molecular sieve VPI-9 has been optimized to produce a pure and highly crystalline material reproducibly. Its complex framework topology (structure type code VNI) has been determined in the space group P4 2 /ncm (a=9.8946, c=36.8715 ) from high resolution synchrotron powder diffraction data collected on an NH +4 -exchanged sample. Attempts...
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