PAILHÉ, Nathalie; WATTIAUX, Alain; GAUDON, Manuel; DEMOURGUES, Alain

doi:10.1016/j.jssc.2008.02.009

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

PAILHÉ, Nathalie

WATTIAUX, Alain
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

GAUDON, Manuel
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

Langue

Article de revue

Ce document a été publié dans

Journal of Solid State Chemistry. 2008, vol. 181, n° 5, p. 1040-1047

Elsevier

Résumé en anglais

Iron (III) rich pigments MgFe2O4 and ZnFe2O4 spinel ferrites and α-Fe2O3 hematite were synthesized by Pechini route and precipitation process, respectively. The compounds were characterized by X-ray diffraction (XRD), Mössbauer spectroscopy and visible-NIR spectroscopy. Diffuse reflectance spectra were interpreted in regard of structural features of the three oxides in order to correlate absorption bands positions with structural parameters. It has been demonstrated that the two main absorption edges occurring in visible range (400-800 nm) can be attributed to two 2p(O2-)→3d(Fe3+) charge transfers, the energy being directly linked to the distortion degree of the [FeO6] octahedra.< Réduire

Mots clés en anglais

Charge transfers

d-d Transitions

Hematite

Red pigments

Spinel ferrites

Structural features

Métadonnées

Licence d’utilisation du document

Correlation between structural features and vis-NIR spectra of α-Fe2O3 hematite and AFe2O4 spinel oxides (A=Mg, Zn)

Langue

Ce document a été publié dans

Résumé en anglais

Mots clés en anglais

DOI

Origine

Unités de recherche