Database of luminescent minerals 

TALC

Chemical formula: Mg₃Si₄O₁₀(OH)₂

Family: Silicates

Status: IMA-GP

Crystal system : Triclinic

Display mineral: NON

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

Luminescence:

Daylight picture

Shortwave (254nm) picture

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

No data

Activator(s) and spectrum:

Activator(s): Mn²⁺ , TiO₆,  O^*,  n[TiO₆] cluster,  

Peaks in the spectrum (nm):

O*_Si around SiO₄ : 360nm

TiO_n (Ti⁴⁺ - Si⁴⁺) : 520nm 

n.TiO_n : 550nm 

Mn²⁺ repl. Mg²⁺ : 600nm 

No spectrum yet

Best localities for fluorescence (*):

• Balmat-Edwards Zinc Mining District, St. Lawrence Co., New York, USA;
• International Talc Company Mine, Talcville, St. Lawrence Co., New York, USA;
• Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex County, New Jersey, USA (talc after willemite);
• Jefferson, NY, USA (var Rensselaerite, talc after pyroxene yellowish-white LW);

(*)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 ,
• Luminescent Spectra of Minerals, Boris S. Gorobets and Alexandre A. Rogojine, Moscow, 2002 ,

Reference for luminescence on the Internet:

Mineralogical reference on the Internet:

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

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

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