MICROCLINE
Chemical Formula: KAlSi3O8
Familly: Silicates
Status: IMA-GP
Crystal System: Triclinic
Mineral for Display: No
Associated names (luminescent varieties, discredited names, synonymes etc.):
amazonite,
Luminescence:
UV Type |
Main color |
Intensity |
Observation Frequency |
|
| | | |
Long Waves (365nm): | Green | Weak | | Mid waves (320 nm): | Blue | Weak | | Short Waves (254 nm): | Red | Medium | | | | | |
Other colors MW: | Violet red , |
Other colors SW: | Bluish White , Violet red , |
Phosphorescence (in the common meaning of the term) seen by naked eye:
No Data
Comments:
Green colored amazonite from Zinkgruvan Mines, Zinkgruvan, Askersund, Närke, Sweden, develop and enhance her green color in sunlight. Newly collected they are grey or only slightly green.
Main Activator(s) and spectrum:
Most Common Activator: Fe3+
Other activators: Eu2+ , Ce3+ , Eu3+ ,
Peaks in the spectrum (nm):
Ce3+: broad band peaking at 335nm
Eu3+: broad band peaking at 402
Eu2+: 395nm
Fe3+ repl. Al3+ or Si4+: band peaking at 700nm
Pb+ repl. K+: 900nm
Spectrum: Michael Gaft, Petah Tikva, Israel. Plot: Institute of Mineralogy, University of Vienna, Austria, with permission of the authors.
...
To the spectrum gallery (1 spectra in the gallery)
Comments on activators and spectra:
Red fluorescence due to trivalent iron Fe3+.
Blue fluorescence due to Ce3+ and Eu3+ (Gaft)
Cathodoluminescence: blue.
Best Locality for luminescence(*):
- Limecrest Quarry, Sparta Township, Sussex Co., New Jersey, USA (red SW);
- Mont St Hilaire, Quebec, Canada;
- Ilimaussaq complex, Kvanefjeld, Narsaq, Kitaa (West Greenland) Province, Greenland;
- Old Mill Site, Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA (pale blue SW);
- Dassu, Skardu District, Pakistan;
- Raikot, Chilas, Diamar District, Gilgit-Baltistan, Pakistan (bright blue SW);
- Kenticha Mine, Ethiopia (fluo bright Red SW);
- Burns Hill area, Milford, Hillsborough Co., New Hampshire, USA (red SW);
- Fillow Quarry, Branchville, Redding, Fairfield Co., Connecticut, USA (red SW);
- Spinelli prospect, Glastonbury, Hartford Co., Connecticut, USA (magenta-red SW);
- Fillow Quarry, Branchville, Redding, Fairfield Co., Connecticut, USA (blue SW);
- Gillette Quarry, Haddam Neck, Haddam, Middlesex Co., Connecticut, USA (blue SW);
- Cheyenne District, El Paso Co., Colorado, USA (red SW);
- Buckwheat pit, Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA (blue SW);
- Kintore Open Cut, Broken Hill, New South Wales, Australia (FL White SW, Dim Blue MW);
- Morro Redondo Mine, Coronel Murta, Minas Gerais, Brazil;
- Imilchil area, Anti-Atlas, Er Rachidia Province, Drâa-Tafilalet Region Morocco;
(*)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 ,
- Luminescent Spectra of Minerals, Boris S. Gorobets and Alexandre A. Rogojine, Moscow, 2002 ,
- Mt St Hilaire Website: http://www.saint-hilaire.ca ,
Luminescence Reference on internet:
Images:
- New Hampshire, USA: http://www.mindat.org/photo-53589.html
- Connecticut, USA : http://www.mindat.org/photo-387758.html
- Connecticut, USA : http://www.mindat.org/photo-426549.html
- Connecticut, USA : http://www.mindat.org/photo-475740.html
- Connecticut,USA: Microcline associated to albite/cleavelandite fluo blue/red: https://www.mindat.org/photo-387609.html
- Fillow Quarry, Connecticut, USA: http://www.mindat.org/photo-463024.html
- Gillette Quarry, Connecticut, USA: http://www.mindat.org/photo-534896.html
- Cheyenne District, Colorado, USA: http://www.mindat.org/photo-628679.html
- Buckwheat pit, Franklin USA: http://www.mindat.org/photo-673948.html
- Limecrest Quarry, New Jersey, USA: http://www.mindat.org/photo-679153.html
- Gilgit-Baltistan, Pakistan: http://www.mindat.org/photo-680476.html
Mineralogical Reference on internet:
http://www.mindat.org/show.php?name=Microcline
http://webmineral.com/data/Microcline.shtml
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