Database of luminescent Minerals


FLUORAPOPHYLLITE


Chemical Formula: KCa4Si8O20(F,OH) 8H2O

Familly: Silicates

Status: IMA-A

Crystal System: Tetragonal

Mineral for Display: No

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

Luminescence:


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Yellowish White
Short Waves (254 nm):      Greenish
Other colors LW:     
Yellow ,
Other colors SW:          
Yellowish White , Green ,
 

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


No Data

Main Activator(s) and spectrum:


Most Common Activator: (UO2)2+ (Uranyl ion) as impurities

Other activators:            Ce3+ , Mn2+ ,

Peaks in the spectrum (nm):

(UO2)2+ : band around 525nm with peaks at 504, 522, 544nm

Mn2+ replacing Ca2+ : band peaking at 600-625nm

Ce3+ replacing Ca2+ : 355, 372nm

[VO4]n- or [TiO4]n- replacing [SiO4] : 500nm


Spectrum: Michael Gaft, Petah Tikva, Israel. Plot: Institute of Mineralogy, University of Vienna, Austria, with permission of the authors.

         ...

  To the spectrum gallery (3 spectra in the gallery)


Comments on activators and spectra:


A specimen from the Nadym River area fluoresces red due to manganese activator. From Mont Saint-Hilaire, crystals have been found that fluoresce intense blue like that of Fluorite under SW, MW, and LW(Jacques Poulin). Also Green luminescence due to U impurities in this locality (pics around 525 nm). Activators: Mn2+ in the Ca position (orange luminescence peaking at 600-620 nm) and Mn2+ in the K position (green emission peaking at 500 nm) (tarashchan); also Ce3+ (343, and 365 nm)(Gaft)


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=Fluorapophyllite

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

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