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Mineral From Wikipedia, the free encyclopedia
Hutchinsonite is a sulfosalt mineral of thallium, arsenic and lead with formula (Tl,Pb)2As5S9. Hutchinsonite is a rare hydrothermal mineral.
Hutchinsonite | |
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General | |
Category | Sulfosalt mineral |
Formula (repeating unit) | (Tl,Pb)2As5S9 |
IMA symbol | Hut[1] |
Strunz classification | 2.HD.45 |
Crystal system | Orthorhombic |
Crystal class | Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) |
Space group | Pbca |
Identification | |
Color | Red, pink, black |
Crystal habit | Acicular – cccurs as needle-like crystals |
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 | [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.
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