Hutchinsonite

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Hutchinsonite
Hutchinsonite-169844.jpg
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
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[1][2][3]

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 Binnental, Switzerland in 1904 and named after Cambridge mineralogist Arthur Hutchinson, F.R.S. (1866–1937).

See also[edit]

References[edit]

  1. ^ Handbook of Mineralogy
  2. ^ Hutchinsonite at Mindat.org
  3. ^ Hutchinsonite at Webmineral

Further reading[edit]

  • Prior, G. T. (1905). "A New Thallium Mineral". Nature. 71 (1849): 534. Bibcode:1905Natur..71Q.534P. doi:10.1038/071534b0.