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
Category Sulfide mineral
Formula
(repeating unit)
(Tl,Pb)2As5S9
Strunz classification 02.HD.45
Identification
Color Red, pink, black
Crystal habit Acicular – cccurs as needle-like crystals
Crystal system Orthorhombic, symbol (2/m 2/m 2/m), space group: Pbca
Cleavage {100} good
Fracture Very brittle fracture producing small, conchoidal fragments
Mohs scale hardness 1.5–2
Luster Sub-metallic
Streak Red
Diaphaneity Subtranslucent to opaque
Specific gravity 4.6
Optical properties biaxial (-)
Refractive index nα = 3.078
nβ = 3.176
nγ = 3.188; 2V = 37°
Birefringence δ = 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]