| Numéro |
J. Phys. Colloques
Volume 41, Numéro C1, Janvier 1980
International Conference on Mössbauer Spectroscopy
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|---|---|---|
| Page(s) | C1-271 - C1-271 | |
| DOI | https://doi.org/10.1051/jphyscol:1980194 | |
International Conference on Mössbauer Spectroscopy
J. Phys. Colloques 41 (1980) C1-271-C1-271
DOI: 10.1051/jphyscol:1980194
Laboratoire de Chimie du Solide du C.N.R.S., 33405 Talence-Cedex, France.
J. Phys. Colloques 41 (1980) C1-271-C1-271
DOI: 10.1051/jphyscol:1980194
SODIUM IRON FLUOROPHOSPHITE GLASSES PART II. EPR AND MÖSSBAUER RESONANCE STUDY
F. Menil, L. Fournes, J.M. Dance et J.J. VideauLaboratoire de Chimie du Solide du C.N.R.S., 33405 Talence-Cedex, France.
Abstract
EPR and Mössbauer measurements have been performed on sodium iron fluorophosphate glasses. Mössbauer spectra show the presence of Fe3+ and Fe2+ both in octahedral coordination sites. However, for low iron concentration, EPR suggests a small number of Fe3+ tetrahedra coexisting with Fe3+ octahedra. On the basis of these results, Fe3+ tetrahedrally and/or octahedrally coordinated, connected with P(O,F)4 tetrahedra would behave as a network-former cation, whereas Fe2+ would substitute for Na+ as a network-modifier. Long range magnetic order previously observed by magnetic measurements has been confirmed for iron-rich compositions.