CELESTITE
Chemical Formula: SrSO4
Familly: Sulfates
Status: IMA-GP
Crystal System: Orthorhombic
Mineral for Display: Yes
Associated names (luminescent varieties, discredited names, synonymes etc.):
celestine,
Luminescence:
UV Type |
Main color |
Intensity |
Observation Frequency |
|
| | | |
Long Waves (365nm): | Bluish White | | | Mid waves (320 nm): | Bluish White | | | Short Waves (254 nm): | Bluish White | | | | | | |
Long Waves Picture (365nm)
Celestite, LW,
Agrigento Province, Sicily, Italy
Col. G. Barmarin; Photo: G. Barmarin
Short Waves Pictures (254nm)
Celestite, SW,
Agrigento Province, Sicily, Italy
Col. G. Barmarin; Photo: G. Barmarin
Phosphorescence (in the common meaning of the term) seen by naked eye:
UV Type |
Color |
Intensity |
Observation Frequency |
Long Wave (365nm): | Bluish White | Medium | |
Short Waves (254 nm): | Bluish White | Medium | |
Main Activator(s) and spectrum:
Most Common Activator: Pb2+
Other activators: Organic impurities ,
Peaks in the spectrum (nm):
Pb2+ (?) : 435nm
Pb2+ (?) : 465 -475nm
Pb2+ (?) : 495 - 500nm
No spectrum for the moment
Comments on activators and spectra:
Steady-state luminescence of celestine is characterized by broad bands, which are associated with adsorption of water-organic complexes (Tarashchan 1978).
Best Locality for luminescence(*):
- Floristella Mine, Enna, Enna Province, Sicily, Italy (fluo blue-white);
- La Grasta mine, Delia, Caltanissetta Province, Sicily, Italy (fluo blue-white);
- Agrigento district, Sicily, Italy (fluo blue-white);
- Racalmuto Mine, Racalmuto, Agrigento Province, Sicily, Italy (fluo blue-white);
- Machów mine, Tarnobrzeg, Podkarpackie, Poland (fluo blue-white LW+SW);
- Kelly Island Stone Co. Quarry, Clay Center, Ottawa Co., Ohio, USA (fluo orange);
- Clay Center, Ottawa Co., Ohio, USA (white LW+SW);
(*)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 ,
- The World of Fluorescent Minerals, Stuart Schneider, Schiffer Publishing, 2006, ISBN 0-7643-2544-2 ,
- Luminescence Spectroscopy of Minerals and Materials, M. Gaft, R. Reisfeld, G. Panczer, Springer Editor, ISBN: 10 3-540-21918-8 ,
Luminescence Reference on internet:
Mineralogical Reference on internet:
http://www.mindat.org/show.php?name=Celestite
http://webmineral.com/data/Celestite.shtml
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