The Structural Characterization of Tin- and Titanium-Dopedα-Fe2O3Prepared by Hydrothermal Synthesis |
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| Authors: | Frank J. Berry Colin Greaves Julia G. McManus Michael Mortimer Gordon Oates |
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| Affiliation: | aDepartment of Chemistry, The Open University, Walton Hall, Milton Keynes, MK7 6AA, United Kingdom;bSchool of Chemistry, The University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom |
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| Abstract: | The structural characteristics of tin- and titanium-dopedα-Fe2O3prepared by hydrothermal methods have been investigated by Rietveld structure 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 the interstitial octahedral sites which are vacant in theα-Fe2O3structure. The structural model deduced involves clusters of three substituted cations and is rational in that it represents microstructural regions of the rutile structure within a matrix ofα-Fe2O3. |
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