Database of luminescent minerals 

NIOCALITE

Chemical formula: Ca₁₄Nb₂(Si₂O₇)₄(O₆,F₂)

Family: Silicates

Status: IMA-GP

Crystal system : Monoclinic

Display mineral: NON

Luminescence:

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

No data

Comments:

The Niocalite crystals are colour zoned in SW UV. The core of the crystals are a bright red colour and the surface of the crystals are a medium yellow-orange colour in SW UV. The Calcite response is the same as the core of the Niocalite crystals. There is no response in LW UV. (Richard Gunther on Mindat)

Activator(s) and spectrum:

No spectrum yet

Best localities for fluorescence (*):

• Bond zone, Oka complex, Oka, Deux-Montagnes RCM, Laurentides, Québec, Canada;

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

Bibliographic reference for luminescence:

• The Henkel Glossary of Fluorescent Minerals, Dr. Gerhard Henkel, Published by the FMS, 1989 ,

Reference for luminescence on the Internet:

Mineralogical reference on the Internet:

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

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

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