Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 8, Issue 2, Pages 224-227Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b512840d
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The structure of amorphous precursor species formed under hydrothermal conditions, prior to the onset of crystallization of microporous aluminosilicate zeolites, is determined employing high-energy X-ray diffraction (HEXRD). The investigation, combined with the use of reverse Monte Carlo modelling suggests that even numbered rings, especially 4R (R: ring) and 6R, which are the dominant aluminosilicate rings in zeolite A, have already been produced in the precursor. The model implies that the formation of double 4Rs occurs at the final step of the crystallization of zeolite A.
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