Database of luminescent Minerals


JOHANNSENITE


Chemical Formula: CaMn+2Si2O6

Familly: Silicates

Status: IMA-A (GP)

Crystal System: Monoclinic

Mineral for Display: No


Luminescence:


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Dark Orange /Tawn Very weak
Mid waves (320 nm):      Not fluorescent
Short Waves (254 nm):      Not fluorescent
Other colors LW:     
Yellow ,
 

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


No Data

Main Activator(s) and spectrum:


No data

Comments on activators and spectra:


It was added to the list of fluorecent minerals of Franklin in 2014 after a study of all the sample of the Franklin Museum with blue light by Charles Mazel and Earl R Verbeeck. (see bibliography)

Johannsenite is best excited under true blue (440-450nm) light and show a yellow luminescence. in LW the response is so weak that it was not considered as fluorescent before this study.


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:


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

  http://webmineral.com/data/Johannsenite.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.

 


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