Database of luminescent minerals 

MICROCLINE

Chemical formula: KAlSi₃O₈

Family: Silicates

Status: IMA-GP

Crystal system : Triclinic

Display mineral: NON

Associated names (luminescent varieties, discredited names, synonyms, etc.): amazonite, 

Luminescence:

Do you have a photo of this mineral you would like to see in the gallery? Contact us!

Phosphorescence (in the common sense of the term) observable with the 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.

Activator(s) and spectrum:

Activator(s): Fe³⁺, 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.

Spectrum Galery:

  
  Go to the galery (2 spectra)

Comments on spectrum and activators:

Red fluorescence due to trivalent iron Fe³⁺.
Blue fluorescence due to Ce³⁺ and Eu³⁺ (Gaft)

Cathodoluminescence: blue.

Best localities for fluorescence (*):

• 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;

(*)The data are not exhaustive and are limited to a few remarkable localities for fluorescence

Bibliographic 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 ,

Reference for luminescence on the Internet:

Mineralogical reference on the Internet:

  http://www.mindat.org/show.php?name=Microcline

  http://webmineral.com/data/Microcline.shtml

Internet Search:

  Image search on 'Google Images'

  Search for documents in all languages on Google

  Search on Wikipedia