Chemistry:Teallite

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Teallite
Teallite-35244.jpg
General
CategorySulfide minerals
Formula
(repeating unit)
PbSnS2
Strunz classification2.CD.05
Crystal systemOrthorhombic
Crystal classDipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m)
Space groupPbnm (no. 62)
Unit cella = 4.26 Å, b = 11.41 Å
c = 4.09 Å; Z = 2
Identification
ColorSilvery gray, lead-gray to iron-gray; tarnishes dull or iridescent
Cleavage{001} perfect (lamellar cleavage); flexible
TenacityMalleable
Mohs scale hardness1 12 – 2
|re|er}}Metallic
StreakBlack
DiaphaneityOpaque
Specific gravity6.36
Optical propertiesAnisotropic
PleochroismWeak
References[1][2]

Teallite is a sulfide mineral of tin and lead with chemical formula: PbSnS2. It occurs in hydrothermal veins and is sometimes mined as an ore of tin. Teallite forms soft silvery grey mica-like plates and crystallizes in the orthorhombic system. The Mohs hardness is 1.5 to 2 and the specific gravity is 6.4.

Teallite was first described in 1904 from its type locality in Santa Rosa, Antequera, Bolivia. It was named for the British geologist Jethro Justinian Harris Teall (1849–1924).[4]

See also

References

  1. Mineralienatlas
  2. Mindat with location data
  3. Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine 85 (3): 291–320. doi:10.1180/mgm.2021.43. Bibcode2021MinM...85..291W. 
  4. Webmineral site

External links