Chemical Formula: Na16Ca16[Al48Si72O240] 64H2O
Crystal System: Orthorhombic
Mineral for Display: No
|Long Waves (365nm): || White ||Short Waves (254 nm): || Yellow |
|Other colors SW: || |
Phosphorescence (in the common meaning of the term) seen by naked eye:
Main Activator(s) and spectrum:
Comments on activators and spectra:
The green SW fluorescence is most probably due to uranyle ions contamination.
Best Locality for luminescence(*):
- Pune (Poona) District, Maharashtra, India;
- Challis, Bay Horse District, Custer Co., Idaho, USA (bright reddish-pink LW, nothing SW, cited by De Ment);
- Southeast Quarry, North Table Mountain, Golden, Golden District, Jefferson Co., Colorado, USA (yellowish white LW);
- Roadcut near Montresta, Oristano Province, Sardinia, Italy (LW white + SW green);
(*)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 ,
- Handbook of Fluorescent Gems and Minerals, a practical guide for the gem and mineral collector, Jack de Ment, 1949 ,
Mineralogical Reference on internet:
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