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  Zeolite Rho Loaded with Methylamines. III. Trimethylamine Loadings

Weidenthaler, C., Fischer, R. X., Abrams, L., & Hewat, A. (1997). Zeolite Rho Loaded with Methylamines. III. Trimethylamine Loadings. Acta Crystallographica Section B, 53(3), 444-450. doi:10.1107/S0108768196012542.

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 Creators:
Weidenthaler, Claudia1, Author              
Fischer, Reinhard X.1, Author
Abrams, Lloyd2, Author
Hewat, Alan3, Author
Affiliations:
1Fachbereich Geowissenschaften der Universität, Klagenfurter Strasse, D-28359 Bremen, Germany, ou_persistent22              
2Central Research and Development Department, E1 du Pont de Nemours & Co., Experimental Station, Wilmington, DE 19880, USA, ou_persistent22              
3lnstitut Laue-Langevin, F-38042 Grenoble CEDEX 9, France, ou_persistent22              

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 Abstract: Samples of two differently prepared zeolites rho loaded with different amounts of trimethylamine (TMA) were studied in their hydrated and dehydrated forms by X-ray and neutron diffraction experiments. Both zeolites are partially dealuminated, as indicated by nonframework Al, which is assumed to be Al2O3 or AlOOH. Series I was prepared from dry-calcined NHn-rho at 873 K, series II from steam-calcined NHn-rho at 773 K. The samples were loaded with different amounts of deuterated TMA. Rietveld refinements yielded the following results for series I: (1) H3.8(H-TMA)5Cs0.2Al9Si39O96.Al2O3.22H2O, X-ray data collection at room temperature, Im3̅m, a = 15.0542 (2) Å, Rwp = 0.094; (2) composition as in (1) (anhydrous), neutron data collection at 5 K of dehydrated and deuterated sample, Im3m, a = 15.0467 (4) Å, Rwp = 0.034. Series II: (3) H0.3(H-TMA)5Cs0.7Al6Si42O96.2.5Al2O3.22H2O, X-ray data collection at room temperature, Im3̅m, a = 15.0574 (2) Å, Rwp = 0.118; (4) composition as in (3) (anhydrous), neutron data collection at 5 K of dehydrated and deuterated sample, lm3̅m, a = 15.0761 (5) Å, Rwp = 0.037. In all determinations the TMA molecules reside with the N and H (D in neutron diffraction analysis) atoms on the central axes (x, 0, 0) pointing towards the center of the single eight-ring, whilst the three methyl groups point away to the center of the α-cage.

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Language(s): eng - English
 Dates: 1996-05-031996-10-071997-06-01
 Publication Status: Published in print
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1107/S0108768196012542
 Degree: -

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Title: Acta Crystallographica Section B
  Other : Acta Crystallogr. Sect. B
Source Genre: Journal
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Publ. Info: New York : Wiley
Pages: - Volume / Issue: 53 (3) Sequence Number: - Start / End Page: 444 - 450 Identifier: ISSN: 0108-7681
CoNE: https://pure.mpg.de/cone/journals/resource/954925468299