Database of luminescent Minerals


Chemical Formula: Na4AlBeSi4O12Cl

Familly: Silicates

Status: IMA-GP

Crystal System: Tetragonal

Mineral for Display: Yes

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


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Orange
Mid waves (320 nm):      Pinkish White
Short Waves (254 nm):      Orange Red
Other colors LW:                    
Pinkish White , Orange Red , Red , Salmon pink ,
Other colors MW:          
Orange , Pink ,
Other colors SW:                    
Yellowish White , Pinkish White , Orange , Red ,

Daylight Picture

Ilimaussaq Complex, Greenland;

Long Waves Picture (365nm)

Ilimaussaq Complex, Greenland;

Mid Waves Pictures (330nm)

Ilimaussaq Complex, Greenland;

Short Waves Pictures (254nm)

Ilimaussaq Complex, Greenland;


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

UV Type Color Intensity Observation Frequency
Long Wave (365nm): Pinkish White Medium
Mid Waves (320 nm): Bluish White Medium
Short Waves (254 nm): Bluish White Medium

Ténébrescence: OUI

Main Activator(s) and spectrum:

Most Common Activator: S2-

Other activators:            Fe3+ , Eu2+ , Ce3+ , Mn2+ ,

Peaks in the spectrum (nm):

S2-  : band with weak vibrational structure peaking at 600-680nm

Fe3+repl. Si4+ : 570 - 680nm

Col. G. Barmarin; Spectre: G. Barmarin


  To the spectrum gallery (1 spectra in the gallery)

Comments on activators and spectra:

It is generally accepted that the yellow-orange emission of tugtupite with weak vibrational structure at 300 K, which becomes more prominent at low temperatures, is connected to a S2-  luminescence center (Povarennykh et al. 1971).


Laser-induced time-resolved technique enables Gaft to detect Eu2+ (Band at 430nm) and Ce3+ (Band at 360nm), two different Mn2+ (Band at 495 & 512nm), Fe3+ (Band at 670nm) and S2-  (Band at 603nm) emission centers.


Best Locality for luminescence(*):

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

Bibliographical Reference for luminescence:

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Mineralogical Reference on internet:

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