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Structural Characterization of Divalent Magnesium-Dopedα-Fe2O3

✍ Scribed by Frank J. Berry; Alberto Bohorquez; Colin Greaves; Julia McManus; Elaine A. Moore; Michael Mortimer

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
254 KB
Volume
140
Category
Article
ISSN
0022-4596

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✦ Synopsis

The defect structure of divalent magnesium-doped -Fe 2 O 3 has been examined by Rietveld structure refinement of the X-ray powder diffraction data. The results show that the Mg 2؉ ions occupy the vacant interstitial octahedral sites as well as substituting on the two adjacent octahedral Fe 3؉ sites in the corundumrelated -Fe 2 O 3 structure. The structure therefore involves a linear cluster of three Mg 2؉ ions replacing two Fe 3؉ ions. Interatomic potential calculations indicate that this is the most energetically favorable defect cluster for the system.

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