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Proceedings Paper

Luminescence spectroscopy of Cr3+ and Mn2+ in spodumene crystals
Author(s): G. Walker; A. El Jaer; R. Sherlock; Thomas J. Glynn; M. Czaja; Zbigniew Mazurak
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Paper 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.

Paper Details

Date Published: 1 November 1997
PDF: 7 pages
Proc. SPIE 3176, Tunable Solid State Lasers, (1 November 1997); doi: 10.1117/12.293447
Show Author Affiliations
G. Walker, Univ. of Manchester Institute of Science and Technology (United Kingdom)
A. El Jaer, Univ. of Manchester Institute of Science and Technology (United Kingdom)
R. Sherlock, Univ. College Galway (Ireland)
Thomas J. Glynn, Univ. College Galway (Ireland)
M. Czaja, Silesian Univ. (Poland)
Zbigniew Mazurak, Polish Academy of Sciences (Poland)

Published in SPIE Proceedings Vol. 3176:
Tunable Solid State Lasers
Wieslaw Strek; Edward Lukowiak; Barbara Nissen-Sobocinska, Editor(s)

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