| Issue |
J. Phys. Colloques
Volume 37, Number C6, Décembre 1976
International Conference on the Applications of the Mössbauer Effect / Conférence Internationale sur les Applications de l'Effet Mössbauer
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|---|---|---|
| Page(s) | C6-829 - C6-832 | |
| DOI | https://doi.org/10.1051/jphyscol:19766174 | |
International Conference on the Applications of the Mössbauer Effect / Conférence Internationale sur les Applications de l'Effet Mössbauer
J. Phys. Colloques 37 (1976) C6-829-C6-832
DOI: 10.1051/jphyscol:19766174
1 Science Institute, University of Iceland, Reykjavikc, Iceland
2 Laboratory of Applied Physics II, Technical University of Denmark DK-2800 Lyngby, Denmark
3 Slovak Technical University, Department of Nuclear Physics and Technics, Bratislava, Czechoslovakia.
J. Phys. Colloques 37 (1976) C6-829-C6-832
DOI: 10.1051/jphyscol:19766174
MÖSSBAUER STUDIES OF ICELANDIC LAVAS
Ö. HELGASON1, S. STEINTHORSSON1, S. MØRUP2, J. LIPKA3, 2 and J. E. KNUDSEN21 Science Institute, University of Iceland, Reykjavikc, Iceland
2 Laboratory of Applied Physics II, Technical University of Denmark DK-2800 Lyngby, Denmark
3 Slovak Technical University, Department of Nuclear Physics and Technics, Bratislava, Czechoslovakia.
Résumé
Deux échantillons de lave d'Islande ont été étudiés par la spectroscopie Mössbauer. On a trouvé qu'une haute vitesse de solidification cause un plus petit éclatement quadrupôlaire des ions Fe2+. Un des échantillons contient des particules superparamagnétiques. Une température de transition magnétique de l'olivine Fe0,34Mg1,66SiO4 est observée entre 5 K et 11 K.
Abstract
Two samples of lava from Iceland have been studied by use of Mössbauer spectroscopy. It is found that a hi& rate of solidification leads to smaller quadrupole splittings of the ferrous doublets. One of the samples contains superparamagnetic particles. The olivine Fe0.34Mg1.66SiO4 becomes magnetically ordered between 5 K and 11 K.