NENADKEVICHITE
Chemical formula: Na8-xNb4(Si4O12)2(O,OH)4 8H2O
Family: Silicates
Status: IMA-GP
Display mineral: NON
Luminescence:
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Longwave UV (365nm) colors: | Green , Greenish ,
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| Intensity LW:Weak
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Midwave UV (320nm) colors: | Green , Greenish ,
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| Intensity MW:Medium
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Shortwave UV (254nm) colors: | Green , Greenish ,
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| Intensity SW:Weak
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Phosphorescence (in the common sense of the term) observable with the naked eye:
No data
Comments:
White coating on the pinacoidal faces of the nenadkevichite from Mont St Hilaire fluoresces sometime green under SW, MW and LW.
Activator(s) and spectrum:
No data
No spectrum yet
Best localities for fluorescence (*):
- Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada;
- Ilimaussaq complex, Kvanefjeld, Narsaq, Kitaa (West Greenland) Province, Greenland;
(*)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 ,
- Fluorescence: Gems and Minerals Under Ultraviolet Light, Manuel Robbins, 1994, Geoscience Press, ISBN 0-945005-13-X ,
- The World of Fluorescent Minerals, Stuart Schneider, Schiffer Publishing, 2006, ISBN 0-7643-2544-2 ,
Reference for luminescence on the Internet:
Mineralogical reference on the Internet:
http://www.mindat.org/show.php?name=Nenadkevichite
http://webmineral.com/data/Nenadkevichite.shtml
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