Abstract
High resolution silicon-29 NMR measurements have been made for three gallium faujasites and a gallium sodalite with Si/(Al + Ga) ratios of 1.14, 1.42, 2.17 and 1.28, respectively. The relative NMR peak intensities for the gallium faujasites are closely similar to their aluminum analogues indicating similar distributions of T atoms in the structure but the peaks are deshielded by an amount proportional to the number of nearest neighbor gallium atoms. The gallium sodalite sample shows similar chemical shift behavior but the relative peak intensities are different to those observed for either Na-X or ZK-4 with the same framework composition.
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