On the discrimination between magnetite and maghemite by XANES measurements in fluorescence mode

被引：48

作者：

Espinosa, A. ^{[2
]}

Serrano, A. ^{[1
]}

Llavona, A. ^{[3
]}

Jimenez de la Morena, J. ^{[1
,3
]}

Abuin, M. ^{[3
]}

Figuerola, A. ^{[4
,5
]}

Pellegrino, T. ^{[5
]}

Fernandez, J. F. ^{[1
]}

Garcia-Hernandez, M. ^{[2
]}

Castro, G. R. ^{[2
,7
]}

Garcia, M. A. ^{[1
,6
]}

机构：

[1] Inst Ceram & Vidrio ICV CSIC, Madrid 28049, Spain

[2] Inst Ciencia Mat Madrid ICMM CSIC, Madrid 28049, Spain

[3] Univ Complutense Madrid, Dept Fis Mat, E-28040 Madrid, Spain

[4] Univ Barcelona, Dept Quim Inorgan, Fac Quim, E-08028 Barcelona, Spain

[5] Ist Italiano Tecnol, I-16163 Genoa, Italy

[6] IMDEA Nanociencia, Madrid 28049, Spain

[7] SpLine Spanish CRG Beamline ESRF, F-38043 Grenoble 09, France

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 2012年 / 23卷 / 01期

关键词：

iron oxides; x-ray absorption; self-absorption; SELF-ABSORPTION; RAY; TRANSITION; EDGE;

D O I：

10.1088/0957-0233/23/1/015602

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We discuss here the quantification of magnetite and maghemite from x-ray absorption near edge spectroscopy at the Fe K-edge in fluorescence mode. We show that the modification of the spectral shape due to self-absorption effects can lead to erroneous results for certain thicknesses. However, for homogeneous samples containing just magnetite and maghemite without other phases, the quantification of magnetite and maghemite can be obtained from the spectra measured in fluorescence mode without correcting the spectra for the self-absorption effects. We describe the conditions to carry on this analysis that requires measuring the reference compounds exactly under the same conditions as the studied samples and using the appropriate thickness.

引用

页数：6

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[1] Comment on 'On the discrimination between magnetite and maghemite by XANES measurements in fluorescence mode'
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[J]. MEASUREMENT SCIENCE AND TECHNOLOGY, 2013, 24 (11)
[2] Reply to the comment on 'On the discrimination between magnetite and maghemite by XANES measurements in fluorescence mode'
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[J]. MEASUREMENT SCIENCE AND TECHNOLOGY, 2013, 24 (11)
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