Chemical Formula: NaCaB5O7(OH)4 3H2O
Crystal System: Monoclinic
Mineral for Display: No
|Long Waves (365nm): || Yellow ||Short Waves (254 nm): || Orange |
|Other colors LW: || |
Yellowish White ,
|Other colors SW: || |
Yellowish White ,
Phosphorescence (in the common meaning of the term) seen by naked eye:
|Long Wave (365nm): ||Yellowish White ||Short Waves (254 nm): ||Yellowish White |
First noticed by j. De Ment, 1949. Fluo maybe due to alteration.
Main Activator(s) and spectrum:
Best Locality for luminescence(*):
- Billie Mine, Death Valley, California, USA (fl. creamy white);
(*)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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