Chemical Formula: Ca6Al2(SO4)3(OH)12 26H2O
Mineral for Display: No
|Long Waves (365nm): || Yellowish White ||Short Waves (254 nm): || Bluish White |
Phosphorescence (in the common meaning of the term) seen by naked eye:
Main Activator(s) and spectrum:
Comments on activators and spectra:
Ettringite was found in 1945 in Franklin Mine; It seemed to be fluorescent due to admixed clinohedrite (see bibliography).
Best Locality for luminescence(*):
- Crestmore Quarry, Riverside, California, USA;
(*)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 ,
Luminescence Reference on internet:
- ETTRINGITE FROM FRANKLIN, NEW JERSEY, Cornelius S. Hurlbut Jr., Harvard, University, and John L. Baum, The New Jersey Zinc Co., Franklin, New Jersey, The American Mineralogist, vol 45 Nov-Dec1960, p1137-1143
Mineralogical Reference on internet:
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