| Numéro |
J. Phys. Colloques
Volume 47, Numéro C8, Décembre 1986
EXAFS and Near Edge Structure IV
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|---|---|---|
| Page(s) | C8-837 - C8-840 | |
| DOI | https://doi.org/10.1051/jphyscol:19868160 | |
EXAFS and Near Edge Structure IV
J. Phys. Colloques 47 (1986) C8-837-C8-840
DOI: 10.1051/jphyscol:19868160
1 Department of Geology, University of Manchester, GB-Manchester M13 9PL, Great-Britain
2 SERC Daresbury Laboratory, GB-Warrington WA4 4AD, Great-Britain
J. Phys. Colloques 47 (1986) C8-837-C8-840
DOI: 10.1051/jphyscol:19868160
Fe K-EDGE X-RAY ABSORPTION SPECTROSCOPY OF SILICATE MINERALS AND GLASSES
N. BINSTED1, G.N. GREAVES2 et C.M.B. HENDERSON11 Department of Geology, University of Manchester, GB-Manchester M13 9PL, Great-Britain
2 SERC Daresbury Laboratory, GB-Warrington WA4 4AD, Great-Britain
Abstract
Structural parameters determined for crystalline iron, fayalite and aegirine agree closely with X-ray crystallograhic data. A glass of NaFeSi2O6 composition has Fe predominantly present as Fe3+ in tetrahedral coordination i.e. as a network former. CaFeSiO4 and CaFeSi2O6 glasses have about 1/3 of the total Fe in octahedral coordination i.e. as a network modifier.