STILLWELLITE-(Ce)

 


Chemical formula: (Ce,La,Ca)BSiO5

Status: IMA-GP

Display mineral: NON

 

Luminescence:

Shortwave UV (254nm) colors:

    


Blue ,

 

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

No data

Comments:

 COLOR CHANGE from red-brown in halogen or sunlight to YELLOW in fluorescent light.

Activator(s) and spectrum:

Activator(s): Sm3+, Dy3+,  Tb3+,  

Peaks in the spectrum (nm):

Tb3+  : 430, 540nm

Sm3+ replacing Ce3+ : 605nm

Dy3+ : 485nm

No spectrum yet

Comments on spectrum and activators:

A complex spectrum due to Rare Earth activators.

Best localities for fluorescence (*):

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

Bibliographic reference for luminescence:

Mineralogical reference on the Internet:

  http://www.mindat.org/show.php?name=Stillwellite-(ce)

  http://webmineral.com/data/Stillwellite-(ce).shtml

Internet Search:

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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.