Database of luminescent Minerals


Chemical Formula:See MEIONITE / (voir aussi/see also MARIALITE)

Familly: Silicates


Crystal System: Tetragonal

Mineral for Display: Yes


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Yellow Very Strong
Short Waves (254 nm):      Yellowish Weak
Other colors LW:     
Orangy yellow ,
Other colors SW:     
Pale Yellow ,

Daylight Picture

Wernerite, Grenville, Argenteuil Co., Québec, Canada
Photo and Copyright: G. Barmarin

Long Waves Picture (365nm)

Wernerite UVLW, Grenville, Argenteuil Co., Québec, Canada
Photo and Copyright: G. Barmarin

Short Waves Pictures (254nm)

Wernerite UVSW, Grenville, Argenteuil Co., Québec, Canada
Photo and Copyright: G. Barmarin


Galerie de photos:


     To the gallery (3 images in the gallery)

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

No Data


One of the most spectacular bright yellow luminescent mineral!

Main Activator(s) and spectrum:

Most Common Activator: S2-

Peaks in the spectrum (nm):

(S2)- : Very broad band peaking around 600-603 nm with some waves superposed

Col. G. Barmarin; Spectre: G. Barmarin


  To the spectrum gallery (1 spectra in the gallery)

Comments on activators and spectra:

De Ment studied the fluorescence spectrum of wernerite in 1943.


 The emission spectrum is dependent upon excitation wavelength, indicating that S2- occupies several different sites.


The luminescence emission spectrum is peculiar in that it is a series of distinct, nearly equally spaced bands, covering the region from 500 to 700nm with maximum intensity just below 600nm. This luminescence was originally attributed to 2+ UO 2 . Kirk (1954; 1955) showed that the luminescence center was more likely to be a polysulfide ion, S,, and later (Schulman and Kirk, 1964) deduced it to be S 2. Similar luminescence is found in hackmanite and in sodium thiosulfate reduced at 900 ° C. under UV light. The luminescence of wernerite can be enhanced by heating the samples to 900 °C for 24 h. (see Burgner R, Scheetz B, White W (1978) Vibrational structure of the S2- luminescence in scapolite. Phys Chem Miner 2:317–324).

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.
A request providing no result means only that no such reference exists in the database, but it does not mean that what you are looking for does not exist, just not to our knowledge. If you think you have found an error or omission, please let us know via the contact page being sure to cite the source of information.


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