Database of luminescent Minerals


Chemical Formula: NaCa2Si4O10F

Familly: Silicates

Status: IMA-A

Crystal System: Triclinic

Mineral for Display: Yes


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


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:

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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.
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