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  Element distribution and growth mechanism of large SAPO-5 crystals

Schunk, S., Demuth, D., Schulz-Dobrick, B., Unger, K., & Schüth, F. (1996). Element distribution and growth mechanism of large SAPO-5 crystals. Microporous and Mesoporous Materials, 6(5-6), 273-285. doi:10.1016/0927-6513(96)00011-9.

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Schunk, S.1, 2, Author              
Demuth, D.2, 3, Author              
Schulz-Dobrick, B4, Author
Unger, K.K.5, Author
Schüth, F.1, 2, Author              
Affiliations:
1Institut für Anorganische Chemie, Johann Wolfgang Goethe-Universität, Marie Curie-Straße 11, 60439 Frankfurt am Main, Germany, ou_persistent22              
2Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445589              
3BASF, Aktiengesellschaft, 67056 Ludwigshafen, Germany, ou_persistent22              
4Institut für Mineralogie, Johannes Gutenberg-Universität Mainz; J.J. Becherweg 21, 55099 Mainz, Germany, ou_persistent22              
5Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg Universität Mainz, Welderweg 15, 55099 Mainz, Germany, ou_persistent22              

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Free keywords: SAPO-5; AlPO4-5; Silicon distribution; Growth mechanism
 Abstract: The spatial distribution of silicon as T-atom substituent in large optically clear crystals with the AFI structure was studied by electron microprobing. The silicon concentration in the center of the crystals is lower by a factor of two to three than in the other part of the crystals. This is the second example of a microporous material, for which an inhomogeneous heteroelement distribution was observed. This corresponds to the findings of our kinetic studies and previous findings concerning the correlation between silicon content and crystal size. During the early stages of AFI crystal growth we found ‘pencil type’ crystals which develop into hexagonal prisms by flattening of the tips during crystal growth. Increasing silicon content accelerates the morphological change and inhibits lengthwise growth of the crystallites.

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Language(s): eng - English
 Dates: 1998-12-091996-07
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/0927-6513(96)00011-9
 Degree: -

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Title: Microporous and Mesoporous Materials
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 6 (5-6) Sequence Number: - Start / End Page: 273 - 285 Identifier: ISSN: 1387-1811
CoNE: https://pure.mpg.de/cone/journals/resource/954926228401