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Flexibility windows and phase transitions of ordered and disordered ANA framework zeolites
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Wells, Stephen A., Sartbaeva, Asel and Gatta, G. D. (2011) Flexibility windows and phase transitions of ordered and disordered ANA framework zeolites. EPL (Europhysics Letters), Vol.94 (No.5). 56001p1-56001p5. doi:10.1209/0295-5075/94/56001
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Official URL: http://dx.doi.org/10.1209/0295-5075/94/56001
Abstract
The analcime-like feldspathoids are a group of microporous minerals with the ANA framework topology. Analcime proper has predominantly Na as its channel cation content, while leucite contains predominantly K, pollucite contains Cs and wairakite contains Ca. Under compression, all these minerals display structural displacive phase transitions to low-symmetry forms at relatively low pressures ( 0.5-3.2GPa). We show, using geometric simulation, that these phase transitions are controlled by the "flexibility window" of the ANA framework, defined as the range of framework densities over which the tetrahedral units of the framework can in principle be made geometrically ideal. We discuss experimental compression data for these minerals and its relationship to the theoretical flexibility of the ANA framework, the influence of cation content, and framework ordering. Copyright (C) EPLA, 2011
| Item Type: | Journal Article | ||||
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| Subjects: | Q Science > QC Physics Q Science > QE Geology |
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| Divisions: | Faculty of Science > Physics Faculty of Science > Centre for Scientific Computing |
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| Library of Congress Subject Headings (LCSH): | Analcime, Zeolites, Pollucite, Leucite, Quartz, Algorithms, Phase transformations (Statistical physics) | ||||
| Journal or Publication Title: | EPL (Europhysics Letters) | ||||
| Publisher: | Institute of Physics Publishing Ltd. | ||||
| ISSN: | 0295-5075 | ||||
| Official Date: | June 2011 | ||||
| Dates: |
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| Volume: | Vol.94 | ||||
| Number: | No.5 | ||||
| Number of Pages: | 5 | ||||
| Page Range: | 56001p1-56001p5 | ||||
| DOI: | 10.1209/0295-5075/94/56001 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Glasstone Research Fellowship, Royal Society (Great Britain) |
Data sourced from Thomson Reuters' Web of Knowledge
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