Hutchinsonite

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

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]

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

References

  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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