Luminescence spectroscopy of Cr3+ and Mn2+ in spodumene crystals

G. Walker; A. El Jaer; R. Sherlock; Thomas J. Glynn; M. Czaja; Zbigniew Mazurak

doi:10.1117/12.293447

1 November 1997 Luminescence spectroscopy of Cr³⁺ and Mn²⁺ in spodumene crystals

G. Walker, A. El Jaer, R. Sherlock, Thomas J. Glynn, M. Czaja, Zbigniew Mazurak

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 C_2v 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.

Citation Download Citation

G. Walker, A. El Jaer, R. Sherlock, Thomas J. Glynn, M. Czaja, and Zbigniew Mazurak "Luminescence spectroscopy of Cr³⁺ and Mn²⁺ in spodumene crystals", Proc. SPIE 3176, Tunable Solid State Lasers, (1 November 1997); https://doi.org/10.1117/12.293447

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