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Galliez, K., Deniard, P., Petit, P.-E., Lambertin, D., Bart, F. & Jobic, S. (2014) Modelling and quantification of intergrowth in gamma-MnO2 by laboratory pair distribution function analysis. J. Appl. Crystallogr. 47 552–560.
Added by: Florent Boucher (2016-04-29 09:26:44) |
| Type de référence: Article DOI: 10.1107/S1600576714000375 Numéro d'identification (ISBN etc.): 0021-8898 Clé BibTeX: Galliez2014 Voir tous les détails bibliographiques  |
Catégories: MIOPS Mots-clés: absorber, beta-mno2, geopolymer, insertion, Lithium batteries, manganese oxides, mno2, nanoparticles, powder neutron-diffraction Créateurs: Bart, Deniard, Galliez, Jobic, Lambertin, Petit Collection: J. Appl. Crystallogr. |
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| Résumé |
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gamma-MnO2 is a material formed by random intergrowth of two phases, beta-MnO2 and R-MnO2. It is demonstrated here on seven gamma-MnO2 samples that pair distribution function analysis using a conventional X-ray diffraction setup (Bragg-Brentano geometry with a molybdenum anode) allows the quantification of this intergrowth simply via a simulation of the actual material by a mixture of beta-MnO2 and R-MnO2 phases. Although this method does not take into account specifically the relaxed distances in the vicinity of the intergrowth zone, it is found to be very robust, accurate and in full agreement with the widely used quantification based on the empirical approach of Chabre & Pannetier [Prog. Solid State Chem. (1995), 23, 1-130].
Added by: Florent Boucher |