TOUNKITE

 


Chemical formula: (Na,Ca,K)8 (Al6 Si6 O24) (SO4)2 Cl H2 O

Family: Silicates

Status: IMA-A

Crystal system : Hexagonal

Display mineral: NON

 

Luminescence:

Longwave UV (365nm) colors:

    


Salmon pink ,

Midwave UV (320nm) colors:

    


Orange Red ,

Shortwave UV (254nm) colors:

    


Salmon pink ,

 

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Phosphorescence (in the common sense of the term) observable with the naked eye:

No data

Activator(s) and spectrum:

Activator(s): S2-,


Figure 5. Photoluminescence (curve 1) and luminescence excitation (curve 2) spectra measured at 80 K.
Source: Minerals 2024, 14(4), 382; https://doi.org/10.3390/min14040382

Comments on spectrum and activators:

Typical spectrum of S2- activator.

Best localities for fluorescence (*):

  • Tultui lazurite deposit, Malaya Bystraya River Valley, Slyudyanka, Lake Baikal area, Irkutsk Oblast, Russia

    • (*)The data are not exhaustive and are limited to a few remarkable localities for fluorescence

    Bibliographic reference for luminescence:

    Reference for luminescence on the Internet:

    Mineralogical reference on the Internet:

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

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

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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.