Database of luminescent minerals 

MAGNESITE

Chemical formula: MgCO₃

Family: Carbonates

Status: IMA-GP

Crystal system : Rhomboedric

Display mineral: NON

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

Luminescence:

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Phosphorescence (in the common sense of the term) observable with the naked eye:

Triboluminescence: OUI

Activator(s) and spectrum:

Activator(s): O^*, ST (Singlet-triplet)-Matière organique en impureté,  Mn²⁺ ,  

Peaks in the spectrum (nm):

O^*around [CO₃]^* : 430nm
ST: 520nm
Mn²⁺ repl. Mg²⁺: 654 - 660nm - 673nm (FWHM: 100nm)

No spectrum yet

Comments on spectrum and activators:

Mn²⁺ activated luminescence in magnesite is characterized by single Gaussian peak at 15300 cm⁻¹ (654 nm).

The CL intensity is nonlinearly related to the Mn²⁺ concentration.

Best localities for fluorescence (*):

• Sonoma County, California, USA;
• Kern, California, USA;
• Bare Hills, Baltimore Co., Maryland, USA (pale white LW);
• Near Cedar Hill Quarry, Lancaster County, Pennsylvania, USA (deweylite + magnesite);
• Haines & Kibblehouse Penn-Maryland Materials Quarry, Fulton Township, State Line Chromite District, Lancaster Co., Pennsylvania, USA (strong white LW+SW);
• Muntodi, Greece (Phosphorescence blue-white SW);
• Baumgarten, Germany (green-white fluorescence and phosphorescence);
• Pomba pit, Serra das Éguas, Brumado, Bahia, Brazil (weak luminescence SW+LW);
• Wiry, GogoÅ‚ów-Jordanów Massif, Lower Silesia, Poland (blue LW+SW);

(*)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 ,
• 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 ,

Reference for luminescence on the Internet:

Mineralogical reference on the Internet:

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

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

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