Database of luminescent Minerals


Chemical Formula: Na8Al6Si6O24Cl2

Familly: Silicates

Status: IMA-GP

Crystal System: Isometric

Mineral for Display: Yes

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


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Orange Very StrongOften
Short Waves (254 nm):      Yellowish White Medium
Other colors LW:                              
Yellowish White , Orangy yellow , Red , Violet red , Violet Pink , Pink ,
Other colors SW:                         
Orange , Violet red , Violet Pink , Salmon pink , Green ,

Daylight Picture

Ilimaussaq Complex, Greenland;

Long Waves Picture (365nm)

Sodalite, UV LW orange;
Ilimaussaq Complex, Greenland;

Short Waves Pictures (254nm)

Sodalite, UV SW orange red ;
Ilimaussaq Complex, Greenland;


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): Bluish White StrongOften
Short Waves (254 nm): Bluish White Very StrongOften

Ténébrescence: OUI

Sodalite, left before and right after exposition to SW (tenebrescence);
Ilimaussaq Complex, Greenland;

Thermoluminescence: Yes


HACKMANITE : strongly tenebrescent variety of sodalite
From Mont Saint-Hillaire, certain sodalite fluoresces yellow. The response is seen under SW and MW, weaker under LW. Build-up is slow but becomes bright.

Main Activator(s) and spectrum:

Most Common Activator: S2-

Other activators:            (UO2)2+ (Uranyl ion) as impurities , Fe3+ , Mn2+ ,

Peaks in the spectrum (nm):

S2- : 587, 608, 628, 653, 677, 707, 732nm

Fe3+? repl. Al3+ : 687-720nm 

(UO2)2+ : 495, 515, 537nm

Mn2+ repl. Na+ : 650nm

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


  To the spectrum gallery (2 spectra in the gallery)

Comments on activators and spectra:

Some time Green Luminescence due to uranium impurities;


Cathodoluminescence: intensive greenish-blue or yellow-green or orange.

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:

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Note: While all due attention has been paid to the implementation of the database, it may contain errors and/or accidental omissions. By nature, the database will always be incomplete because science always evolves according to new analysis.
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