| 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) | C2-350 - C2-352 | |
| DOI | https://doi.org/10.1051/jphyscol:19792124 | |
J. Phys. Colloques 40 (1979) C2-350-C2-352
DOI: 10.1051/jphyscol:19792124
A MÖSSBAUER EFFECT STUDY OF THE QUADRUPOLE INTERACTION IN PARAMAGNETIC CHLORINE AND FLURINE CONTAINING β-FeOOH
D. Chambaere, A. Govaert, E. de Grave, G. Harts and G. RobbrechtLaboratory of Magnetism, University of Ghent, Proeftuinstraat 86, B-9000 Ghent, Belgium
Résumé
Des échantillons de β-FeOOH contenant des ions de chlorure et fluorure ont été étudiés par microscopie électronique, diffraction de rayons X et spectroscopie Mössbauer. L'apparence macroscopique des cristaux, ainsi que leurs propriétés microscopiques diffèrent beaucoup d'une variété à l'autre. On suggère que, les ions de chlorure n'occupant que les trous de la maille élémentaire, les ions de fluorure peuvent aussi substituer des OH dans les octaèdres O/OH.
Abstract
Chlorine and fluorine containing β-FeOOH samples are studied by electron microscopy, Röntgendiffraction and Mösssbauer spectroscopy. The macroscopic shape of the crystals, as well as their microscopic properties are found to be very different for both varieties. It is suggested that, while chlorine ions only occupy the holes exhibited by the unit cell, fluorine ions might also substitute OH's in the O/OH octahedra.