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  3. THE STRUCTURE OF ZEOLITE ZSM-23 (MTT) REFINED FROM SYNCHROTRON X-RAY-POWDER DATA

THE STRUCTURE OF ZEOLITE ZSM-23 (MTT) REFINED FROM SYNCHROTRON X-RAY-POWDER DATA

TitleTHE STRUCTURE OF ZEOLITE ZSM-23 (MTT) REFINED FROM SYNCHROTRON X-RAY-POWDER DATA
Publication TypeJournal Article
Year of Publication1993
AuthorsMarler, B, Deroche, C, Gies, H, Fyfe, CA, Grondey, H, Kokotailo, GT, Feng, Y, Ernst, S, Weitkamp, J, Cox, DE
JournalJournal of Applied Crystallography
Volume26
Pagination636-644
Date PublishedOct
Type of ArticleArticle
ISBN Number0021-8898
Abstract

The structure of zeolite ZSM-23 (structure-type code MTT) loaded with NH4F [a(o) = 11.129 (1), b(o) = 5.025 (1) and c(o) = 21.519 (1) angstrom and beta = 89.85 (4)-degrees] was refined from high-resolution synchrotron X-ray powder data. The Rietveld refinement converged in space group P12(1)1 (No. 4) to R(F) = 0.090 and R(wp) = 0.085, confirming the proposed model of the silicate framework. The use of complementary methods (synchrotron X-ray powder diffraction, Si-29 magic-angle-spinning, nuclear-magnetic-resonance spectroscopy, and distance and angle least-squares refinements) was essential for the determination of the true space-group symmetry, a prerequisite for the successful Rietveld structure refinement.
URL<Go to ISI>://A1993ME34700003