Characterization of guest molecules adsorbed on zeolites of known structure by combined x-ray powder profile refinements and conventional difference-Fourier techniques. Part I - Localization of the benzene molecule in a pentasil type zeolite
It has been possible to localize the benzene guest molecule in a pentasil type zeolite by combining full profile X-ray powder diffraction structure refinements with conventional difference-Fourier synthesis, after extraction of the integrated intensities from the powder pattern. The investigations have been performed on the calcined H/sub 4.83/Al/sub 4.80/B/sub 0.03/Si/sub 91.17/O/sub 192/ phase (H-ZSM-5 form) which has been saturated with benzene vapor at low pressure. The same data-collection has been processed in two different ways: 1) a trial-and-error procedure described elsewhere shows that the benzene molecule appears to be present at the channel - intersection with two simultaneous orientations, and 2) direct characterization by the interpretation of a difference-Fourier map reveals the presence of two peaks situated on the mirror plane. Combining the results yielded by both methods shows that the benzene molecule rotates freely about an axis situated on the mirror plane.
- Research Organization:
- Laboratoire de Physico-Chimie Minerale I, UA 116 du CNRS, Universite Claude-Bernard, LYON I 43, Bd du 11 Novembre 1918, F-69622 Villeurbanne Cedex
- OSTI ID:
- 6545223
- Journal Information:
- Mater. Res. Bull.; (United States), Vol. 22:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BENZENE
DISTRIBUTION
ZEOLITES
CHEMICAL COMPOSITION
SATURATION
STRUCTURAL CHEMICAL ANALYSIS
ALUMINIUM OXIDES
BORON OXIDES
CALCINATION
CHEMICAL PREPARATION
FOURIER ANALYSIS
HYDROXIDES
MOLECULES
POWDERS
SILICON OXIDES
X-RAY DIFFRACTION
ALUMINIUM COMPOUNDS
AROMATICS
BORON COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
COHERENT SCATTERING
DECOMPOSITION
DIFFRACTION
HYDROCARBONS
HYDROGEN COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
SCATTERING
SILICON COMPOUNDS
SYNTHESIS
THERMOCHEMICAL PROCESSES
360602* - Other Materials- Structure & Phase Studies
360601 - Other Materials- Preparation & Manufacture