CORDIERITE
Chemical Formula: (Mg,Fe)2Al(Al3Si5O18) x(H2O,CO2)
Familly: Silicates
Status: IMA-GP
Crystal System: Orthorhombic
Mineral for Display: No
Luminescence:
UV Type |
Main color |
Intensity |
Observation Frequency |
|
| | | |
Short Waves (254 nm): | Violet Pink | | | | | | |
Other colors SW: | Red , Violet red , Pink , |
Phosphorescence (in the common meaning of the term) seen by naked eye:
No Data
Comments:
Light blue XLS from El Hoyazo, Níjar, Almería, Andalusia, Spain are fluorescent under UVC in a shade of pink. (see mindat picture)
Main Activator(s) and spectrum:
Most Common Activator: Fe3+
Other activators: Cr3+ , Mn2+ ,
Peaks in the spectrum (nm):
Mn2+ repl. Mg2+ : 640nm
Fe3+ repl. (Al3+,Si4+)IV : 750nm
Cr3+ repl. Al3+ : 693nm
No spectrum for the moment
Best Locality for luminescence(*):
- Tongul, Altaï;
- Katun-Chuya Massif, Altaï;
- Richmond, NH, USA (cited by De Ment 1947);
- El Hoyazo, Níjar, Almería, Andalusia, Spain;
(*)Data are not exhaustive and are limited to the most important localities for fluorescence
Bibliographical Reference for luminescence:
- Luminescence Spectroscopy of Minerals and Materials, M. Gaft, R. Reisfeld, G. Panczer, Springer Editor, ISBN: 10 3-540-21918-8 ,
- 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:
http://www.mindat.org/show.php?name=Cordierite
http://webmineral.com/data/Cordierite.shtml
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