Chemical Formula: NaSi7O13(OH)3 4H2O
Crystal System: Monoclinic
Mineral for Display: No
|Long Waves (365nm): || Yellowish White ||Medium||Mid waves (320 nm): || Yellowish White ||Medium||Short Waves (254 nm): || Yellowish White ||Medium|
Phosphorescence (in the common meaning of the term) seen by naked eye:
|Long Wave (365nm): ||White ||Weak||Mid Waves (320 nm): ||Greenish white ||Weak||Short Waves (254 nm): ||Greenish white ||Medium|
Main Activator(s) and spectrum:
Best Locality for luminescence(*):
- Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada;
- Trinity Lake, Trinity county, California, USA;
(*)Data are not exhaustive and are limited to the most important localities for fluorescence
Bibliographical Reference for luminescence:
Luminescence Reference on internet:
Mineralogical Reference on internet:
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