Talc : CSIRO Spectroscopy Database

Talc

Images

Photograph of a specimen of talc and tremolite from Arnold Pit, Balmat Mine, St Lawrence Co., New York. Size: 10cm

© Photo (C) 2003 James O. Hamblen (http://hamblen.ece.gatech.edu/uvminerals/). Reproduced with permission.

Shortwave UV photoluminescence image of a specimen of talc (yellow PL) and tremolite (orange PL) from Arnold Pit, Balmat Mine, St Lawrence Co., New York. Size: 10cm

© Photo (C) 2003 James O. Hamblen (http://hamblen.ece.gatech.edu/uvminerals/). Reproduced with permission.

Image of a specimen of Talc from Innsbruck, Tyrol, Austria

© Photograph by Frank Coffa, Museums Victoria, CC-BY

Properties

Formula	Mg₃Si₄O₁₀(OH)₂
Abbreviation	Tlc
Classifications	Minerals containing OH, Clay
Luminescence emitters	M3OH, M[n]OH, OH, RSC, Si-O, Triplet-singlet
Spectra	Reflectance (3)
IMA Status	Grandfathered (pre-IMA), antiquity
Search other databases	webmineral.com, mindat.org, rruf.info, mineralienatlas.de, Handbook of Mineralogy, American Mineralogist Crystal Structure Database
Crystal symmetry	Monoclinic, Point group 2/m, Space group C2/c (#15)
Tags	Mineral, Silicate , Hydroxide

Composition

Element	Atoms
O	12
H	2
Si	4
Mg	3
Total:	21

References

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Laukamp et al. 2021

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Pejcic et al. 2021 (EP2021-1148)

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CSIRO Reflectance (2025)

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Tarashchan 1978

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