Database of luminescent Minerals


SPODUMENE


Chemical Formula: LiAlSi2O6

Familly: Silicates

Status: IMA-A (GP)

Crystal System: Monoclinic

Mineral for Display: Yes

Associated names (luminescent varieties, discredited names, synonymes etc.):  hiddenitekunzite

Luminescence:


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Orange Red
Short Waves (254 nm):      Orange

Long Waves Picture (365nm)


OL (365 nm). Col. G. Barmarin; Photo: G. Barmarin

 

Galerie de photos:

            ...

     To the gallery (7 images in the gallery)


Phosphorescence (in the common meaning of the term) seen by naked eye:


UV Type Color Intensity Observation Frequency
Long Wave (365nm): Orange
Short Waves (254 nm): Orange
 

Ténébrescence: OUI




Thermoluminescence: Yes


Comments:


variety triphane (colorless), Kunzite (pink) and Hiddenite (green).


Main Activator(s) and spectrum:


Most Common Activator: Mn2+

Other activators:            Cr3+ ,

Peaks in the spectrum (nm):

Mn2+ substituting for Li : broad band around 596 - 615nm

Cr3+ : 690nm


Spectrum: Michael Gaft, Petah Tikva, Israel. Plot: Institute of Mineralogy, University of Vienna, Austria, with permission of the authors.


Comments on activators and spectra:


Mn2+ is shown to be mainly in Li-sites rather than Al-sites and gives rise to a broad emission centred at 600 nm. In Cr-rich crystals only one R1 line is observed and Cr3+ emission is evident at room temperature. In green hiddenite crystals Cr3+ emission is dominant at room temperature where the R-lines are superimposed on a broad-band emission. (Source: Luminescence spectroscopy of Cr3+ and Mn2+ in spodumene (LiAlSi2O6), WALKER G. see below).


Best Locality for luminescence(*):


(*)Data are not exhaustive and are limited to the most important localities for fluorescence


Bibliographical Reference for luminescence:



Luminescence Reference on internet:



Mineralogical Reference on internet:


  http://www.mindat.org/show.php?name=Spodumene

  http://webmineral.com/data/Spodumene.shtml

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