Chemical Formula: Th (Ca,Na)2 (K1-x Xx) Si8 O20 nH2 O
Crystal System: Tetragonal
Mineral for Display: No
|Long Waves (365nm): || Green ||Weak||Short Waves (254 nm): || Green |
Phosphorescence (in the common meaning of the term) seen by naked eye:
Main Activator(s) and spectrum:
Most Common Activator: (UO2)2+ (Uranyl ion) as impurities
Peaks in the spectrum (nm):
UO22+ : 515, 530 (max), 550 nm (Gorobets)
No spectrum for the moment
Best Locality for luminescence(*):
- Dara-i-Pioz, Tadjikistan;
(*)Data are not exhaustive and are limited to the most important localities for fluorescence
Bibliographical Reference for luminescence:
- Luminescent Spectra of Minerals, Boris S. Gorobets and Alexandre A. Rogojine, Moscow, 2002 ,
Mineralogical Reference on internet:
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