Chemical Formula: (Ce,La,Ca)BSiO5
Mineral for Display: No
|Short Waves (254 nm): || Blue |
Phosphorescence (in the common meaning of the term) seen by naked eye:
COLOR CHANGE from red-brown in halogen or sunlight to YELLOW in fluorescent light.
Main Activator(s) and spectrum:
Most Common Activator: Sm3+
Other activators: Dy3+ , Tb3+ ,
Peaks in the spectrum (nm):
Tb3+ : 430, 540nm
Sm3+ replacing Ce3+ : 605nm
Dy3+ : 485nm
No spectrum for the moment
Comments on activators and spectra:
A complex spectrum due to Rare Earth activators.
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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