CHAROITE
Chemical Formula: (K,Na)5(Ca,Ba,Sr)8(Si12O30)(Si6O16)(OH) 4H2O
Familly: Silicates
Status: IMA-A
Crystal System: Monoclinic
Mineral for Display: No
Luminescence:
UV Type |
Main color |
Intensity |
Observation Frequency |
|
| | | |
Short Waves (254 nm): | Red | | | | | | |
Phosphorescence (in the common meaning of the term) seen by naked eye:
No Data
Comments:
Fluorescence is reported in the violet gem variety of this boron fluoro-silicate from near the Nadym River, Krasnoyarsk territory Russia. Fluorescence is red due to manganese activator. Activators: Mn2+ (very large pic at 530 nm), Ce3+ (360 nm), Eu2+ (408 - 410 nm)(Gaft)
Main Activator(s) and spectrum:
Most Common Activator: Mn2+
Other activators: Eu2+ , Ce3+ ,
Peaks in the spectrum (nm):
Ce3+ : 360-380nm
Eu2+ : 408 or 410nm
Mn2+ repl. Ca2+ : 530nm (band), 580nm
No spectrum for the moment
Best Locality for luminescence(*):
- Nadym river, Krasnoyarsk territory, Russia;
(*)Data are not exhaustive and are limited to the most important localities for fluorescence
Bibliographical 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 ,
- Luminescence Spectroscopy of Minerals and Materials, M. Gaft, R. Reisfeld, G. Panczer, Springer Editor, ISBN: 10 3-540-21918-8 ,
- Luminescent Spectra of Minerals, Boris S. Gorobets and Alexandre A. Rogojine, Moscow, 2002 ,
Mineralogical Reference on internet:
http://www.mindat.org/show.php?name=Charoite
http://webmineral.com/data/Charoite.shtml
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