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Al-for-Fe substitution in hematite: the effect of low Al concentrations in the Raman spectrum of Fe2O3

Journal of Raman spectroscopy, 2008-01, Vol.39 (1), p.40-46 [Peer Reviewed Journal]

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Title:
Al-for-Fe substitution in hematite: the effect of low Al concentrations in the Raman spectrum of Fe2O3
Author: Zoppi, A. ; Lofrumento, C. ; Castellucci, E. M. ; Sciau, Ph
Subjects: Al-hematite ; Aluminium ; Aluminum ; Doppler effect ; Hematite ; Insertion ; Line broadening ; micro-Raman spectroscopy ; PCA ; Shoulders ; Spectra
Is Part Of: Journal of Raman spectroscopy, 2008-01, Vol.39 (1), p.40-46
Description: Five different mixed Al‐hematites with an aluminium molar content varying from 0 to 10% were investigated by micro‐Raman spectroscopy to study the effect of Al‐for‐Fe substitution on the hematite lattice. A red shift of hematite vibrational wavenumbers and a line broadening were observed; also a shoulder located near 430 cm−1 and a broad band at 670 cm−1 developed. The variation of the spectral features is discussed in terms of a local disorder correlated to the insertion of Al3+ ions into the Fe(O)6 octahedra constituting hematite structure. A multivariate analysis was also carried out on the spectral data to distinguish between the doped samples analysed. Copyright © 2007 John Wiley & Sons, Ltd.
Publisher: Chichester, UK: John Wiley & Sons, Ltd
Language: English
Identifier: ISSN: 0377-0486
EISSN: 1097-4555
DOI: 10.1002/jrs.1811
Source: Alma/SFX Local Collection

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