Reference : Crystal chemistry and polymorphism of an iron-tungsten mixed oxide
Scientific congresses and symposiums : Unpublished conference/Abstract
Physical, chemical, mathematical & earth Sciences : Chemistry
http://hdl.handle.net/2268/228663
Crystal chemistry and polymorphism of an iron-tungsten mixed oxide
English
[en] Cristallochimie et polymorphisme d'un oxyde mixte fer-tungstène
Caubergh, Stéphane mailto [Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale >]
Jungers, Thomas mailto [Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale >]
Mahmoud, Abdelfattah mailto [Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT >]
Boschini, Frédéric mailto [Université de Liège - ULiège > > Plateforme APTIS >]
Vertruyen, Bénédicte mailto [Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale >]
17-Oct-2018
No
No
National
10th Belgian Crystallography Symposium
17 octobre 2018
National Committee for Crystallography
Bruxelles
Belgium
[en] Crystallography ; Structure refinement ; Structure resolution ; Polymorphism ; Synchrotron ; Photoelectrochemistry ; Spray-drying
[en] Among the complex metal oxides, the crystal chemistry of the iron-tungsten oxide Fe2WO6 is of interest because of the existence of several crystal structures with different organizations of the FeO6 and WO6 octahedra. The conditions of polymorphism are still unclear: structures were reported in the literature for only two of the three polymorphs (α and γ) and very little is known about the third polymorph (β). For the first time, we could synthesize a complete set of the three polymorphs as single-phase products by spray-drying. We proposed a new structural model for α-polymorph. We confirmed the existence of β-polymorph and solved its structure. With this procedure of synthesis, we were also able to control and tune the Fe/W ratio and investigate the possibility for a solid solution domain. The final products were characterized by means of X-Ray Diffraction (synchrotron data), Rietveld refinement, Scanning Electron Microscopy and 57Fe Mossbauer spectroscopy.
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Fonds pour la formation à la Recherche dans l'Industrie et dans l'Agriculture (Communauté française de Belgique) - FRIA
Etude de la cristallochimie et des propriétés photo-électrochimiques d'un oxyde de fer et de tungstène
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/228663

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