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Hutchinsonite

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Hutchinsonite
Hutchinsonite, from Quiruvilca Mine, Santiago de Chuco Province, Peru. Size: 4.5×4.4×2.2 cm
General
CategorySulfosalt mineral
Formula
(repeating unit)
(Tl,Pb)2As5S9
IMA symbolHut[1]
Strunz classification2.HD.45
Crystal systemOrthorhombic
Crystal classDipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m)
Space groupPbca
Identification
ColorRed, pink, black
Crystal habitAcicular – cccurs as needle-like crystals
Cleavage{100} good
FractureVery brittle fracture producing small, conchoidal fragments
Mohs scale hardness1.5–2
LusterSub-metallic
StreakRed
DiaphaneitySubtranslucent to opaque
Specific gravity4.6
Optical propertiesBiaxial (−)
Refractive indexnα = 3.078
nβ = 3.176
nγ = 3.188; 2V = 37°
Birefringenceδ = 0.110
References[2][3][4]

Hutchinsonite is a sulfosalt mineral of thallium, arsenic and lead with formula (Tl,Pb)2As5S9. Hutchinsonite is a rare hydrothermal mineral.

It was first discovered in a sample from Binnental, Switzerland, in 1903 and named after Cambridge mineralogist Arthur Hutchinson, F.R.S. (1866–1937) in 1904.

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. ^ Handbook of Mineralogy
  3. ^ Hutchinsonite at Mindat.org
  4. ^ Hutchinsonite at Webmineral

Further reading

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