Red photoluminescence and purple color of naturally irradiated fluorite

Autor: Dima Cheskis, Michael Gaft, Glenn A. Waychunas, Gérard Panczer, Yosef Raichlin, George R. Rossman, L. Nagli
Přispěvatelé: Ariel University, Lawrence Berkeley National Laboratory [Berkeley] (LBNL), Division of Geological and Planetary Sciences [Pasadena], California Institute of Technology (CALTECH), Spectroscopies optiques des matériaux verres, amorphes et à nanoparticules (SOPRANO), Institut Lumière Matière [Villeurbanne] (ILM), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon
Rok vydání: 2020
Předmět:
Zdroj: Physics and Chemistry of Minerals
Physics and Chemistry of Minerals, Springer Verlag, 2020, 47 (11), pp.46. ⟨10.1007/s00269-020-01116-4⟩
ISSN: 1432-2021
0342-1791
DOI: 10.1007/s00269-020-01116-4
Popis: International audience; 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 MNa center.
Databáze: OpenAIRE