| Autor: |
Cohen, Alvin J., Adekeye, Jacob I. D., Hapke, Bruce, Partlow, Deborah P. |
| Zdroj: |
Physics and Chemistry of Minerals; November 1985, Vol. 12 Issue: 6 p363-369, 7p |
| Abstrakt: |
Evidence for the presence of Sn2+ in an octahedral interstitial site in synthetic and natural cassiterite (SnO2) is presented. The absorption and relative absorption spectral peaks measured are similar to ones found in Sn2+-doped KI by absorption spectrophotometry and Sn2+-doped soda-silica glass by reflection spectroscopy. The estimated quantity of interstitial Sn2+ present is found by calculating that needed to balance the uncompensated M3+ impurity in substitutional Sn4+ sites where M3+ is mainly Al3+ and Fe3+. Estimates of the oscillator strengths of three Sn2+ bands detected by absorption spectrophotometry in the synthetic crystal are given. The interstitial Sn2+ content in synthetic and natural cassiterite is not affected by heating,60Co gamma irradiation, or UV light treatment with a high pressure xenon-mercury lamp. |
| Databáze: |
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