Chemical Formula: K2Mg[(UO2)(SO4)2]2·8H2O
Crystal System: Orthorhombic
Mineral for Display: No
|Long Waves (365nm): || Yellowish Green ||Short Waves (254 nm): || Yellowish Green |
Phosphorescence (in the common meaning of the term) seen by naked eye:
No phosphorescence seen by naked eye whatever the type of UV
Strong yellowish green fluorescence in SW and LW UV.
Main Activator(s) and spectrum:
Most Common Activator: (UO2)2+ (Uranyl ion) intrinsic
No spectrum for the moment
Best Locality for luminescence(*):
- Geschieber vein, Svornost Mine (Einigkeit Mine), Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Czech Republic;
(*)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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