1 November 1997 Luminescence spectroscopy of Cr3+ and Mn2+ in spodumene crystals
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Proceedings Volume 3176, Tunable Solid State Lasers; (1997) https://doi.org/10.1117/12.293447
Event: Tunable Solid State Lasers, 1996, Wroclaw, Poland
Abstract
Luminescence emission and excitation spectra of a number of natural spodumene crystals have been measured at temperatures down to 12K. Both Cr3+ and Mn2+ centers were identified: Mn2+ is shown to be mainly in Li-sites rather than Al-sites and gives rise to abroad emission centered at 600 nm. In most spodumenes Cr3+ R-line emission with phonon sideband is observed at temperatures below 100K. In green hiddenite crystals Cr3+ emission is dominant at room temperature where the R-lines are superimposed on a broad-band emission. Calculation of the crystal-field splitting of the Cr3+ energy levels has been carried out assuming a C2v pseudo-symmetry for the Al-sites. In the more Mn- rich crystals multiple R1 lines are seen at temperatures below about 40K which are possibly associated with adjacent point defects due to charge compensation effects.
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G. Walker, G. Walker, A. El Jaer, A. El Jaer, R. Sherlock, R. Sherlock, Thomas J. Glynn, Thomas J. Glynn, M. Czaja, M. Czaja, Zbigniew Mazurak, Zbigniew Mazurak, } "Luminescence spectroscopy of Cr3+ and Mn2+ in spodumene crystals", Proc. SPIE 3176, Tunable Solid State Lasers, (1 November 1997); doi: 10.1117/12.293447; https://doi.org/10.1117/12.293447
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