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. 2014 Apr 21;7(4):3198–3250. doi: 10.3390/ma7043198

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© 2014 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 21. — (a) Experimental adsorption (filled) and desorption (empty) isotherms of Xe in MIL-53(Al) at 220 K (in blue), and the fitting of Langmuir isotherms using the lp (black dash) and np (red dash) forms, respectively; (b) simulated structural transition stresses of the lp (black) and np (red) forms. σ*_np and σ*_lp denote the critical stresses of the structural transitions upon adsorption (A1 and A2) and desorption (D1 and D2), respectively. Reprinted with permission from [128]. Copyright 2010 American Chemical Society.