Database of luminescent Minerals


EVANSITE


Chemical Formula: Al3(PO4)(OH)6 6H2O (?)

Familly: Phosphates, Arseniates, Vanadates

Status: Q

Crystal System: Amorphous

Mineral for Display: No

Associated names (luminescent varieties, discredited names, synonymes etc.):  BOLIVARITE

Luminescence:


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Yellowish White
Short Waves (254 nm):      Yellowish White

Daylight Picture


EVANSITE, Richelle, Visé, Province de Liège, Belgique;
Col. G.Barmarin; Photo: G. Barmarin

Long Waves Picture (365nm)


EVANSITE, Richelle, Visé, Province de Liège, Belgique;
UVLW
Col. G.Barmarin; Photo: G. Barmarin

Short Waves Pictures (254nm)


EVANSITE, Richelle, Visé, Province de Liège, Belgique;
UVSW
Col. G.Barmarin; Photo: G. Barmarin

 

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


UV Type Color Intensity Observation Frequency
Long Wave (365nm): Yellowish White Strong
 

Main Activator(s) and spectrum:


Most Common Activator: Organic impurities

Peaks in the spectrum (nm):

Broad band centered around 550nm; 522nm, 560nm, 600nm


Col. G. Barmarin; Spectre: G. Barmarin


Comments on activators and spectra:


The spectrum shape combined with strong phosphorescence lets think that the fluorescence is due to organic impurities (to be investigated);


Best Locality for luminescence(*):


(*)Data are not exhaustive and are limited to the most important localities for fluorescence


Bibliographical Reference for luminescence:



Mineralogical Reference on internet:


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

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

Search 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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