Database of luminescent Minerals
TALC-1A
Chemical Formula: Mg3Si4O10(OH)2
Familly: Silicates
Status: IMA-GP;PLM
Crystal System: Triclinic
Mineral for Display: No
Associated names (luminescent varieties, discredited names, synonymes etc.): steatite,Luminescence:
| UV Type | Main color | Intensity | Observation Frequency |
|---|---|---|---|
| Long Waves (365nm): | Yellowish White | Mid waves (320 nm): | Yellowish White | Short Waves (254 nm): | Yellowish White |
| Other colors LW: | White , Bluish White , Pale Yellow , Greenish white , | ||
| Other colors MW: | White , Bluish White , Pale Yellow , Greenish white , | ||
| Other colors SW: | White , Bluish White , Pale Yellow , Greenish white , | ||
Daylight Picture
Short Waves Pictures (254nm)
TALC under uvSW
Photo and Copyright: James Hamblen
Site of the author
Used with permission of the author
Phosphorescence (in the common meaning of the term) seen by naked eye:
No Data
Main Activator(s) and spectrum:
Most Common Activator: Mn2+
Other activators: TiO6 , O* , n[TiO6] cluster ,
Peaks in the spectrum (nm):
O*Si around SiO4 : 360nm TiOn (Ti4+ - Si4+) : 520nm n.TiOn : 550nm Mn2+ repl. Mg2+ : 600nm
Best Locality for luminescence(*):
- Balmat-Edwards Zinc Mining District, St. Lawrence Co., New York, USA;
- International Talc Company Mine, Talcville, St. Lawrence Co., New York, USA;
- Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex County, New Jersey, USA (talc after willemite);
- Jefferson, NY, USA (var Rensselaerite, talc after pyroxene yellowish-white LW);
(*)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 ,
- Luminescent Spectra of Minerals, Boris S. Gorobets and Alexandre A. Rogojine, Moscow, 2002 ,
Luminescence Reference on internet:
- Sterling Mine, Ogdensburg, Franklin Mining District, NJ, USA: https://www.mindat.org/photo-548915.html
- International Talc Company Mine, Talcville, New York, USA: https://www.mindat.org/photo-674873.html
- Balmat-Edwards Zinc Mining District, New York, USA: https://www.mindat.org/photo-516111.html
Images:
Mineralogical Reference on internet:
http://www.mindat.org/show.php?name=Talc-1a
http://webmineral.com/data/Talc-1a.shtml
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