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| Naji, M. |
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| Motta, Antonella |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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Wells, Stephen
University of Bath
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2023Broadband infrared absorber based on a sputter deposited hydrogenated carbon multilayer enhancing MEMS-based CMOS thermopile performancecitations
- 2017Defining the flexibility window in ordered aluminosilicate zeolitescitations
- 2015GASP: software for geometric simulations of flexibility in polyhedral and molecular framework structurescitations
- 2011Flexibility windows and phase transitions of ordered and disordered ANA framework zeolitescitations
- 2009Compression behaviour and flexibility window of the analcime like feldspathoids: experimental and theoretical findingscitations
- 2008Flexibility window controls pressure-induced phase transition in analcimecitations
- 2007Local structural variability and the intermediate phase window in network glassescitations
- 2005Ionic diffusion in quartz studied by transport measurements, SIMS and atomistic simulationscitations
- 2005Total scattering and reverse Monte Carlo study of the 105 K displacive phase transition in strontium titanatecitations
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article
Flexibility windows and phase transitions of ordered and disordered ANA framework zeolites
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 (0.5-3.2 GPa). 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 © EPLA, 2011.