Mostrar el registro sencillo del ítem

Impact of structural features on pigment properties of α-Fe2O3 haematite

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorPAILHÉ, Nathalie
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorWATTIAUX, Alain
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGAUDON, Manuel
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDEMOURGUES, Alain
dc.date.issued2008
dc.identifier.issn0022-4596
dc.description.abstractEnVarious α-Fe2O3 haematite samples were synthesized by precipitation routes (under standard or hydrothermal conditions) followed by thermal treatments under air. The trigonal distortion (C3v point group) of the Fe3+ octahedral sites, which depends on the synthesis route and thermal treatment, was investigated by X-ray diffraction, Mössbauer spectroscopy and visible–near infrared (Vis–NIR) spectroscopy. The correlation between diffuse reflectance spectra and structural features of the haematite samples is reported and discussed herein. The slight increase of the average distortion of the Fe3+ octahedral sites, which depends on the annealing temperature of the precipitated sample, directly linked to the crystallite size, contrasts with the larger reduction of the sites distortion for the compound prepared by hydrothermal route due to the occurrence of hydroxyl groups substituted for O2− anions as well as Fe3+ cationic vacancies. On a local point of view, as shown by Mössbauer spectroscopy, the Fe3+ octahedral sites distortion decreases from the centre towards the surface of the grains. Then the smaller the grain size, the lower the average site distortion. Finally, the reduction of the octahedral distortion was directly correlated to the two Fesingle bondO charge transfer bands in the visible range and the colour of as-prepared haematites.
dc.language.isoen
dc.publisherElsevier
dc.subject.enRed pigments
dc.subject.enHaematite
dc.subject.enX-ray diffraction
dc.subject.enMössbauer spectroscopy
dc.subject.enVis–NIR spectroscopy
dc.title.enImpact of structural features on pigment properties of α-Fe2O3 haematite
dc.typeArticle de revue
dc.identifier.doi10.1016/j.jssc.2008.06.049
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Solid State Chemistry
bordeaux.page2697-2704
bordeaux.volume181
bordeaux.issue10
bordeaux.peerReviewedoui
hal.identifierhal-00338774
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00338774v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Solid%20State%20Chemistry&rft.date=2008&rft.volume=181&rft.issue=10&rft.spage=2697-2704&rft.epage=2697-2704&rft.eissn=0022-4596&rft.issn=0022-4596&rft.au=PAILH%C3%89,%20Nathalie&WATTIAUX,%20Alain&GAUDON,%20Manuel&DEMOURGUES,%20Alain&rft.genre=article


Archivos en el ítem

ArchivosTamañoFormatoVer

No hay archivos asociados a este ítem.

Este ítem aparece en la(s) siguiente(s) colección(ones)

Mostrar el registro sencillo del ítem