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  Optical Investigations of Intergrowth Effects in the Zeolite Catalysts ZSM-5 and ZSM-8

Weidenthaler, C., Fischer, R. X., Shannon, R. D., & Medenbach, O. (1994). Optical Investigations of Intergrowth Effects in the Zeolite Catalysts ZSM-5 and ZSM-8. The Journal of Physical Chemistry, 98(48), 12687-12694. doi:10.1021/j100099a036.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0024-2207-3 Version Permalink: https://hdl.handle.net/21.11116/0000-0007-4C91-0
Genre: Journal Article

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 Creators:
Weidenthaler, C.1, Author           
Fischer, R. X.1, Author
Shannon, R. D.1, Author
Medenbach, O.2, Author
Affiliations:
1Institut für Geowissenschaften der Universität Mainz, Saarstrasse 21, D-55099 Mainz, Germany, ou_persistent22              
2Institut für Mineralogie der Universität Bochum, Universitätsstrasse 150, D-44780 Bochum, Germany, ou_persistent22              

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 Abstract: X-ray precession photographs and optical investigations of TPA-ZSM-5 (silicalite) and TEA-ZSM-8 zeolites
reveal that ZSM-8 consists of two interpenetrating species rotated by 90° round the crystallographic c axis
similarly to ZSM-5. The c axis of ZSM-5 coincides with refractive index nx, the c axis of ZSM-8 coincides
with ny. The intergrowth species are differently shaped in ZSM-5 and ZSM-8. ZSM-5 consists of an
orthorhombic prism penetrated by two pyramidal fragments. The ZSM-8 crystals studied here consist of
species with two-dimensional hourglass-like shapes embedded in orthorhombic prisms. The orientations of
the optical indicatrices of ZSM-5 and ZSM-8 are identical after calcination, Le., after removing or decomposing
the template. This confirms recent work which showed that the framework structures of ZSM-5 and ZSM-8
are essentially identical.

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Language(s): eng - English
 Dates: 1994-05-171994-07-131994-12-01
 Publication Status: Issued
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/j100099a036
 Degree: -

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Title: The Journal of Physical Chemistry
  Abbreviation : J. Phys. Chem.
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Chemical Society
Pages: - Volume / Issue: 98 (48) Sequence Number: - Start / End Page: 12687 - 12694 Identifier: ISSN: 1932-7447
CoNE: https://pure.mpg.de/cone/journals/resource/954926947766_3