Database of luminescent Minerals

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:

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

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 

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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