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A high-resolution NMR and synchrotron x-ray powder diffraction study of zeolite ZSM-11

Published online by Cambridge University Press:  31 January 2011

B. H. Toby ,
M. M. Eddy ,
C. A. Fyfe ,
G. T. Kokotailo ,
H. Strobl  and
D. E. Cox
B. H. Toby
Affiliation:
Union Carbide Corporation, Tarrytown, New York 10591
M. M. Eddy
Affiliation:
University of California at Santa Barbara, Santa Barbara, California 93106
C. A. Fyfe
Affiliation:
Guelph Waterloo Center for Graduate work in Chemistry, Guelph Campus, Department of Chemistry and Biochemistry, University of Guelph, Guelph, Ontario N1G 2W1, Canada
G. T. Kokotailo
Affiliation:
Guelph Waterloo Center for Graduate work in Chemistry, Guelph Campus, Department of Chemistry and Biochemistry, University of Guelph, Guelph, Ontario N1G 2W1, Canada
H. Strobl
Affiliation:
Guelph Waterloo Center for Graduate work in Chemistry, Guelph Campus, Department of Chemistry and Biochemistry, University of Guelph, Guelph, Ontario N1G 2W1, Canada
D. E. Cox
Affiliation:
Brookhaven National Laboratory, Upton, New York 11973
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Abstract

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 (1978)], which involves 54 variable atomic positional parameters. The structure is tetragonal (a = 20.065 Å, c = 13.408 Å at 25 °C) and consistent with the previously reported tetragonal space group I \overline 4 m2, but the NMR spectra indicate local deviations from this symmetry that disappear at 100 °C.

Type
Articles
Information
Journal of Materials Research , Volume 3 , Issue 3 , June 1988 , pp. 563 - 569
Copyright
Copyright © Materials Research Society 1988

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References

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