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
作者： A.Y. Leinekugel-le-Cocq-Errien , P. Deniard , S. Jobic , E. Gautier , M. Evain
DOI: 10.1016/J.JSSC.2006.10.013
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摘要: X-ray patterns of the Ba{sub 1}Cs{sub 0.28}Fe{sub 0.82}Al{sub 1.46}Ti{sub 5.72}O{sub 16} compound evidence two wide peaks at low angle in addition to well defined I4/m hollandite structure type. Two hypotheses have been explored account for these features: coexistence phase with an amorphous and appearance a commensurate or incommensurate modulated associated cationic ordering, as proposed literature. Actually, even if quantification by Rietveld method reveals about 15 wt% non-crystalline some powdered sample, origin was found stem from character type (super space group I4/m(0 0 {gamma})0 0) distribution modulation wavevectors presumably related slight chemical composition changes. - Graphical abstract: Amorphous localization.
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