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Teallite

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Teallite
General
CategorySulfide minerals
Formula
(repeating unit)
PbSnS2
IMA symbolTel[1]
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
LusterMetallic
StreakBlack
DiaphaneityOpaque
Specific gravity6.36
Optical propertiesAnisotropic
PleochroismWeak
References[2][3]

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

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References

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  1. ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. ^ Mineralienatlas
  3. ^ Mindat with location data
  4. ^ Webmineral site
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