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Aikinite - Beresowsk, Ural.JPG
Category Sulfide mineral
(repeating unit)
Strunz classification 2.HB.05a
Dana classification
Crystal system Orthorhombic
Dipyramidal class
Unit cell a = 11.297, b = 11.654
c = 4.061 [Å], Z = 4
Formula mass 575.92 g/mol
Color Lead gray, grayish black, reddish brown
Crystal habit Acicular, massive
Crystal symmetry Orthorhombic
H-M symbol: (2/m 2/m 2/m)
Space group: Pnma
Cleavage {010} indistinct
Mohs scale hardness 2-2.5
Luster Metallic
Streak Grayish black
Diaphaneity Opaque
Specific gravity 6.1–6.8, Average = 6.44
Other characteristics Not radioactive
References [1][2]

Aikinite is a sulfide mineral of lead, copper and bismuth with formula PbCuBiS3. It forms black to grey or reddish brown acicular orthorhombic crystals with a Mohs hardness of 2 to 2.5 and a specific gravity of 6.1 to 6.8. It was originally found in 1843 in the Beryozovskoye deposit, Ural Mountains. It is named after Arthur Aikin (1773–1854), an English geologist.


  1. ^ Aikinite. Webmineral
  2. ^ Aikinite.