ELNES spectroscopy of mixed Si coordination minerals |
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| Authors: | B Poe F Seifert T Sharp Z Wu |
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| Institution: | Bayerisches Geoinstitut, Universit?t Bayreuth, 95440 Bayreuth, Germany Fax: +49-921-553-769, DE
Commissariat à l’Energie Atomique, DSM/DRECAM/SRSIM, Batiment 462, CE Saclay, 91191 Gif-sur-Yvette Cedex, France, FR
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| Abstract: | Si K- and L-edge ELNES spectroscopy and multiple-scattering (MS) calculations are used to examine mixed Si coordination compounds
varying in SiVI:SiIV ratio. As in previous studies, the edges are influenced mainly by silicon coordination (tetrahedral vs. octahedral), as supported
by the MS calculations. We demonstrate two methods semi-quantitatively to extract the value of SiVI/(SiVI+SiIV): (1) A linear relationship between the L2,3-L1 splitting and SiVI/(SiVI+SiIV) is observed, (2) a fitting method based on the coaddition of reference tetrahedral and octahedral Si spectra is applied
to both Si K- and L-edge ELNES spectra.
Received: February 10, 1997 / Revised, accepted: May 23, 1997 |
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