Chemical Formula: Mn+2Zn2(SiO4)(OH)2
Crystal System: Monoclinic
Mineral for Display: No
|Long Waves (365nm): || Red ||Weak||Mid waves (320 nm): || Red ||Weak|
Phosphorescence (in the common meaning of the term) seen by naked eye:
De Ment (1949) gives a (doubtfull) yellowish green fluorescence color under both LW and SW.
Main Activator(s) and spectrum:
Best Locality for luminescence(*):
- Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA (dull red LW but not all specimens);
(*)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 ,
Luminescence Reference on internet:
Mineralogical Reference on internet:
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