FORSTERITE
Chemical Formula: Mg2SiO4
Familly: Silicates
Status: IMA-GP
Crystal System: Orthorhombic
Mineral for Display: No
Luminescence:
UV Type |
Main color |
Intensity |
Observation Frequency |
|
| | | |
Long Waves (365nm): | Yellowish White | | | Short Waves (254 nm): | Yellowish White | | | | | | |
Other colors LW: | Pale Yellow , Yellowish , |
Other colors SW: | Pale Yellow , Yellowish , |
Phosphorescence (in the common meaning of the term) seen by naked eye:
No Data
Thermoluminescence: Yes
Main Activator(s) and spectrum:
Most Common Activator: Mn2+
Other activators: Cr3+ , Fe3+ , O* ,
Peaks in the spectrum (nm):
Mn2+ repl. Mg2+ : Broad band peaking at 627-660nm (decay time: 29ms)
Cr3+ repl. Mg2+ (?) : 683, 693nm
Fe3+ repl. Si4+ : 710nm
O*Si around SiO4 : 420, 440nm
O*Al (Al3+ - Si4+ : 470nm
Spectrum: Michael Gaft, Petah Tikva, Israel. Plot: Institute of Mineralogy, University of Vienna, Austria, with permission of the authors.
Best Locality for luminescence(*):
- Gabbs Valley Range, Mineral Co., Nevada, USA (?);
- Crestmore Quarries, Crestmore, Riverside Co., California, USA;
- ZCA No. 4 Mine (St Joe Mine), Balmat, Balmat-Edwards Zinc District, St. Lawrence Co., New York, USA (?);
- Limekiln Canyon, Pacoima, CA, USA (?) (blue, SW+LW);
- Cascade Canyon, San Gabriel Mts, San Bernardino Co., 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 Spectroscopy of Minerals and Materials, M. Gaft, R. Reisfeld, G. Panczer, Springer Editor, ISBN: 10 3-540-21918-8 ,
- Luminescent Spectra of Minerals, Boris S. Gorobets and Alexandre A. Rogojine, Moscow, 2002 ,
- Handbook of Fluorescent Gems and Minerals, a practical guide for the gem and mineral collector, Jack de Ment, 1949 ,
Mineralogical Reference on internet:
http://www.mindat.org/show.php?name=Forsterite
http://webmineral.com/data/Forsterite.shtml
Search on Internet:
Search for images on 'Google Image'
Search for documents in English on Google
Search for documents in any languages on Google
Search on Wikipédia
Note: While all due attention has been paid to the implementation of the database, it may contain errors and/or accidental omissions. By nature, the database will always be incomplete because science always evolves according to new analysis.
A request providing no result means only that no such reference exists in the database, but it does not mean that what you are looking for does not exist, just not to our knowledge. If you think you have found an error or omission, please let us know
via the contact page being sure to cite the source of information.