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Leinekugel-le-Cocq-Errien, A. Y., Deniard, P., Jobic, S., Gautier, E., Evain, M., Aubin, V. & Bart, F. (2007) Structural characterization of the hollandite host lattice for the confinement of radioactive cesium: Quantification of the amorphous phase taking into account the incommensurate modulated character of the crystallized part. J. Solid State Chem. 180 322–330. 
Added by: Laurent Cournède (2016-03-10 22:02:31)
Type de référence: Article
DOI: 10.1016/j.jssc.2006.10.013
Numéro d'identification (ISBN etc.): 0022-4596
Clé BibTeX: LeinekugelleCocqErrien2007
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Catégories: MIOPS
Mots-clés: amorphous phase quantification, chemistry, constitution, electron, immobilization, incommensurate modulated structure, nuclear waste confinement, synroc-type hollandites, synthetic hollandites, x-ray-diffraction, xrd
Créateurs: Aubin, Bart, Deniard, Evain, Gautier, Jobic, Leinekugel-le-Cocq-Errien
Collection: J. Solid State Chem.
Consultations : 19/673
Indice de consultation : 3%
Indice de popularité : 0.75%
Résumé     
X-ray patterns of the Ba1Cs0.28Fe0.82Al1.46Ti5.72O16 compound evidence two wide peaks at low angle in addition to the well defined peaks of the I4/m hollandite structure type. Two hypotheses have been explored to account for these features: the coexistence of the hollandite phase with an amorphous phase and the appearance of a commensurate or incommensurate modulated structure associated with a cationic ordering, as proposed in the literature. Actually.. even if the amorphous phase quantification by the Rietveld method reveals about 15 wt\% of non-crystalline phase in some of the powdered sample, the origin of the two wide peaks was found to stem from the incommensurate modulated character of the hollandite structure type (super space group I4/rn(00 gamma)00) with a distribution of the modulation wavevectors presumably related to slight chemical composition changes. (c) 2006 Elsevier Inc. All rights reserved.
Added by: Laurent Cournède  
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