| Autor: |
Maria Czaja, Jan Cisowski, Jean Voiron, Zbigniew Mazurak, J. Heimann, Joanna A. Bartkowska |
| Rok vydání: |
2004 |
| Předmět: |
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| Zdroj: |
European Journal of Mineralogy. 16:671-675 |
| ISSN: |
0935-1221 |
| DOI: |
10.1127/0935-1221/2004/0016-0671 |
| Popis: |
We have studied the high-field magnetization (up to 14.5 T) and magnetic susceptibility in the temperature range 1.7 - 420 K of two samples of jadeite (NaAlSi2O6), white and green, containing transition metal ions and originating from Burma (now Myanmar). It appears that the high-temperature susceptibility data obey the Curie-Weiss law indicating the onset of the antiferromagnetic interaction between the magnetic ions. This interaction is also seen in the high-field magnetization data which are well described by the phenomenological cluster model. As a result of our analysis, we have identified the Fe3+ ions as the dominant ones in the studied jadeites and we have determined the molar concentration of these ions (0.8% in white- and 2.5% in green jadeite) as well as the diamagnetic susceptibility of the jadeite matrix (-3.8 × 10-7 emu/g). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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