High-resolution NMR and synchrotron x-ray powder diffraction study of zeolite ZSM-11
Journal Article
·
· J. Mat. Res.; (United States)
High-resolution nuclear magnetic resonance (NMR) spectra and synchrotron x-ray powder diffraction data have been obtained from a well-crystallized highly dealuminated sample of the zeolite ZSM-11. The Rietveld profile technique has been applied to the synchrotron data to give the first detailed refinement of the idealized structure derived ten years ago by distance least-squares modeling methods (G. T. Kokotailo, P. Chu, S. L. Lawton, and W. M. Meier, Nature 275, 119 (1078)), which involves 54 variable atomic positional parameters. The structure is tetragonal (a = 20.065 A, c = 13.408 A at 25 /sup 0/C) and consistent with the previously reported tetragonal space group I4-barm2, but the NMR spectra indicate local deviations from this symmetry that disappear at 100 /sup 0/C.ion
- Research Organization:
- Union Carbide Corporation, Tarrytown, New York 10591
- OSTI ID:
- 5219713
- Journal Information:
- J. Mat. Res.; (United States), Journal Name: J. Mat. Res.; (United States) Vol. 3:3; ISSN JMREE
- Country of Publication:
- United States
- Language:
- English
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