Influence of Sn⁴⁺ and Sn⁴⁺/Mg²⁺ doping on structural features and visible absorption properties of α-Fe₂O₃ hematite

Manuel Gaudon (1) , Nathalie Pailhé (1) , Jérôme Majimel (1) , Alain Wattiaux (1) , Jonathan Abel (1) , Alain Demourgues (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

Pure, Sn-doped and Mg/Sn co-doped α-Fe₂O₃ hematite samples were synthesized by precipitation process. Fe₂O₃ is the most popular red mineral pigment which is used largely in traditional ceramics, tar and concrete. The compounds were characterized by powder X-ray diffraction (XRD), scanning transmission electronic microscopy (energy dispersive X-ray cartography), Mössbauer spectroscopy, magnetic investigations versus temperature and visible-NIR spectroscopy. Both 57Fe and 119Sn Mössbauer analyses combined with rietveld XRD refinements are the ideal techniques to characterize tin-iron oxides. Hence, thanks to these techniques it was shown how the synthesis temperature influences directly the grain size and the dopants concentration limit which can be incorporated into the host hematite matrix...

Mots clés: Hematite; Pigment; X-ray diffraction; Mössbauer spectroscopy; Visible-NIR spectroscopy

Domaines: Matériaux

Manuel Gaudon, Nathalie Pailhé, Jérôme Majimel, Alain Wattiaux, Jonathan Abel, et al.. Influence of Sn⁴⁺ and Sn⁴⁺/Mg²⁺ doping on structural features and visible absorption properties of α-Fe₂O₃ hematite. Journal of Solid State Chemistry, 2010, 183 (9), pp.2101-2109. ⟨10.1016/j.jssc.2010.04.043⟩. ⟨hal-00589667⟩