| Issue |
J. Phys. Colloques
Volume 40, Number C2, Mars 1979
International Conference on The Applications of The Mössbauer Effect
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|
|---|---|---|
| Page(s) | C2-456 - C2-459 | |
| DOI | https://doi.org/10.1051/jphyscol:19792159 | |
J. Phys. Colloques 40 (1979) C2-456-C2-459
DOI: 10.1051/jphyscol:19792159
ANALYSIS OF THE MÖSSBAUER SPECTRA OF SEVERAL IRON-RICH TOURMALINES (SCHORLS)
N. Saegusa1, D.C. Price1 and G. Smith21 Dept. of Solid State Physics, Research School of Physical Sciences, Australian National University, Canberra, Australia
2 Mineralogisch-Petrologisches Institut und Museum der Universität Bonn, 53 Bonn, Poppelsdorfer Schloß, W. Germany.
Résumé
On a appliqué systématiquement un procédé d'ajustement des spectres Mössbauer dans le cas de cinq tourmalines du type dravite-schorl étudiées à des températures comprises entre 4.2 K et 600 K. Aucune supposition a priori n'a été faite concernant le nombre de sites de fer et leur occupation relative. Le meilleur ajustement a été obtenu avec quatre doublets quadrupolaires, bien que les paramètres de certains de ces doublets indiquent la possibilité de recouvrement. On discule de modèles pouvant expliquer l'origine de ces doublets.
Abstract
The Mössbauer spectra of five tourmalines in the dravite-schorl series at temperatures in the range 4.2K to 600K have been subjected to a systematic fitting procedure. No prior models of numbers of iron sites or their relative occupations were assumed. It was found that a fitting scheme containing four quadrupole doublets was adequate to fit the spectra of all of the samples over the whole temperature range, although the parameters of some of these doublets indicated that they may contain more than one overlapping component. Possible models for the origins of these doublets are briefly discussed.