THE STRUCTURAL CHARACTERIZATION OF TIN-DOPED AND TITANIUM-DOPED ALPHA-FE2O3 PREPARED BY HYDROTHERMAL SYNTHESIS

Authors
BERRY FJ GREAVES C MCMANUS JG MORTIMER M OATES G
Citation
Fj. Berry et al., THE STRUCTURAL CHARACTERIZATION OF TIN-DOPED AND TITANIUM-DOPED ALPHA-FE2O3 PREPARED BY HYDROTHERMAL SYNTHESIS, Journal of solid state chemistry, 130(2), 1997, pp. 272-276
Citations number
15
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Physical
Journal title
Journal of solid state chemistry → ACNP
ISSN journal
00224596
Volume
130
Issue
2
Year of publication
1997
Pages
272 - 276
Database
ISI
SICI code
0022-4596(1997)130:2<272:TSCOTA>2.0.ZU;2-7
Abstract
The structural characteristics of tin- and titanium-doped alpha-Fe2O3 prepared by hydrothermal methods have been investigated by Rietveld st ructure refinement of the X-ray powder diffraction data. The analysis reveals that the dopant ions adopt two distinct sites: in addition to partially substituting at the octahedral Fe sites, they also occupy th e interstitial octahedral sites which are vacant in the alpha-F2O3 str ucture. The structural model deduced involves clusters of three substi tuted cations and is rational in that it represents microstructural re gions of the rutile structure within a matrix of alpha-Fe2O3. (C) 1997 Academic Press.