Abstract
The catalytic, separations and ion-exchange behavior of the synthetic zeolites is governed largely by the nature of their framework structures, a detailed knowledge of which is then a prerequisite for an in-depth understanding of their function. Despite the complexity of zeolite crystal structures, powder neutron diffraction is now being applied successfully to several facets of zeolite structural chemistry. The present review considers the study of zeolites by powder neutron diffraction and outlines the information that such studies have, to date, provided on zeolite framework geometries and their sensitivity to framework or nonframework cation substitution, the ordering and partitioning of framework cations, the distributions of the nonframework cations, and the locations and structures of sorbed species. The potential impact of ongoing developments in instrumentation and analysis techniques is also addressed.
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