Published November 2020
| public
Journal Article
Red photoluminescence and purple color of naturally irradiated fluorite
Abstract
Natural radiation-induced red fluorescence of fluorite consists of two broad bands at 750 and 635 nm with very short decay times of 20.3 and less than 5 ns, respectively. The first one is connected to an M center compensated by Na, while the second is connected to an M⁺ center, possibly formed as result of the M center's destruction by UV irradiation. The optically active centers in naturally irradiated fluorite responsible for red luminescence and purple color are different from one another. The most probable reason for the purple color is colloidal calcium and not the M_(Na) center.
Additional Information
© 2020 Springer Nature. Received 30 June 2020. Accepted 03 October 2020. Published 15 October 2020. The authors express their gratitude to Dr. Naomi Porat and Dr. Eugenii Zakon from Geological Survey of Israel for thermoluminescence and Q-ICPMS data.Additional details
- Eprint ID
- 106087
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- CaltechAUTHORS:20201015-152732512
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2020-10-16Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field
- Caltech groups
- Division of Geological and Planetary Sciences