Database of luminescent Minerals


Chemical Formula: KCa2AlBe2Si12O30 0,5H2O

Familly: Silicates

Status: IMA-GP

Crystal System: Hexagonal

Mineral for Display: No


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Bluish White Strong
Mid waves (320 nm):      Bluish White Strong
Short Waves (254 nm):      Bluish White Strong
Other colors LW:     
Green ,
Other colors SW:     
Green ,

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

No Data

Main Activator(s) and spectrum:

Most Common Activator: Ce3+

Other activators:            Pb2+ , Fe3+ , Eu2+ , Mn2+ ,

Peaks in the spectrum (nm):

Ce3+ replacing Ca2+ : 340, 360 - 365 nm 

Eu2+ repl. Ca2+ : 405 - 406 nm

Mn2+ repl.Ca2+ : 550 nm, 560 - 561 nm (excitation: 532nm)

Pb2+ (?) : 292 nm

Fe3+ : 755nm  (excitation: 532nm)

No spectrum for the moment

Comments on activators and spectra:

Ce3+, Eu2+ and Mn2+ centers characterize steady-state luminescence spectra of milarite (Gorobets and Rogojine 2001). Time-resolved luminescence spectra are characterized by short lived Ce3+, Eu2+, and possibly Pb2+ .

Excitation by CW laser with 532 and 785 nm revealed several luminescence bands and lines supposedly connected to Mn2+, Fe3+and Nd3+ .

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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