http://hdl.handle.net/20.500.12128/9152
Title: | Luminescence and other spectroscopic properties of purple and green Cr-clinochlore |
Authors: | Czaja, Maria Kądziołka-Gaweł, Mariola Lisiecki, Radosław Bodył-Gajowska, Sabina Mazurak, Zbigniew |
Keywords: | Cr-clinochlore; luminescence; optical absorption; infrared; Raman and Mössbauer spectra |
Issue Date: | 2014 |
Citation: | Physics and Chemistry of Minerals, Vol. 41, iss. 2 (2014), s. 115-126 |
Abstract: | For the first time ever, the luminescence spectra of Cr3+ centers in two chlorite crystals are presented. Chromium ions occupy the strong crystal-field site M4 in the brucite sheet and the intermediate crystal-field site in the inner octahedral sheet for purple and green chlorite, respectively. We discuss the influence of an effective positive charge on the Cr3+ ion and an effective negative charge of ligands on the differences in the values of the Dq and B parameters. It is concluded that the presence of Fe2+ ions and other point defects, as well as concentration quenching, causes the very short luminescence lifetimes of chromium ions. |
URI: | http://hdl.handle.net/20.500.12128/9152 |
DOI: | 10.1007/s00269-013-0629-x |
ISSN: | 0342-1791 |
Appears in Collections: | Artykuły (WNP) |
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Czaja_Luminescence_and_other_spectroscopic.pdf | 873,07 kB | Adobe PDF | View/Open |
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