Database of luminescent Minerals


AGRELLITE


Chemical Formula: NaCa2Si4O10F

Familly: Silicates

Status: IMA-A

Crystal System: Triclinic

Mineral for Display: Yes


Luminescence:


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Pink Very weak
Mid waves (320 nm):      Violet Pink Strong
Short Waves (254 nm):      Violet Pink MediumAlways

Daylight Picture


AGRELLITE, Kipawa River, Quebec, Canada;

Photo and Copyright: James Hamblen
Site of the author
Used with permission of the author

Short Waves Pictures (254nm)


AGRELLITE, Kipawa River, Quebec, Canada;
OC (254 nm).
Photo and Copyright: James Hamblen
Site of the author
Used with permission of the author

 

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


UV Type Color Intensity Observation Frequency
Long Wave (365nm): None by naked eye
Mid Waves (320 nm): None by naked eye
Short Waves (254 nm): Yellowish White Medium
 

Comments:


Sometimes associated with : hyalite (fluo green SW), VLASOVITE (fluo yellow-orange SW), feldspath (fluo red SW), red eudyalite and brown mosandrite;

 

Some SW 4 color specimens from the Darai-Pioz Glacier, Tajikistan. have white fluorescing Baratovite, Pink fluorescing Agrellite, Magenta fluorescing Microcline, and an unknown fluorescing Green (hyalite?).


Main Activator(s) and spectrum:


Most Common Activator: Mn2+

Other activators:            Fe3+ , Eu2+ , Ce3+ , Sm3+ , Dy3+ , Nd3+ , Gd3+ ,

Peaks in the spectrum (nm):

Mn2+ replacing Ca2+: Large band peaking at 580nm
Eu2+: 410nm
Sm3+: 560, 597, 602, 640nm
Dy3+: 475, 485, 580nm
Fe3+ replacing Si4+: 740nm
Nd3+(?): 955nm
Ref. sample: (555), (561), 566, (593), (600), 604, (612), (639), 646, 661, 698 and 706 nm


Agrellite, Canada. Excitation: laser 405nm. Col. G. Barmarin; Spectre: G. Barmarin


Comments on activators and spectra:


A brief but distinctive orange flash is seen before the magenta luminescence (typical of Mn activator?).
RE elements (RRE2+ and RRE3+) replacing Ca2+ are suspected as activators. Also Mn and Fe.
Fluorescence: pink LW after Robbins and other authors, clearly visible with pointer-laser @405nm.
As with other minerals activated by RRE, the shape of the spectrum is strongly influenced by the resolution of the spectrometer because RRE have a lot of very narrow peaks very close from each other. If the resolution of the spectrometer is not sufficient, the pikes are agglomerated in larger entities.

 

There is sometime a green fluorescent mineral accompagning agrellite. It is sometime reported as thorium activated calcite (???) that will glow green sw and mw whitish green lw and will phos under all 3 waves. Sometime thorite coating are invoqued to explain the green fluorescence in specimens from Kipawa.

Albite fluorescing red SW is also often present.


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=Agrellite

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

Search on Internet:

  Search for images on 'Google Image'

  Search for documents in English on Google

  Search for documents in any languages on Google

  Search on Wikipédia


 

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.

 


Quick search by fluorescent mineral name: