Mineral Information and Data:

Babkinite
Pb2Bi2S3 [CNMNC approved formula]

Named for P. V. Babkin (1929-1977), noted Russian Geologist and the first investigator of the Nevskoye deposit.

IMA status : Approved Species 1994 (IMA1994-030)
CLASSIFICATION 
Dana
(8th edition) :
02.06.02.08  
  (02) Sulfides - Including Selenides and Tellurides
  (02.06) where Am Bn Xp, with (m+n):p=4:3
  (02.06.02) Joseite Group (Trigonal: R-3m)
  
Nickel-Strunz
(10th edition) :
02.GC.40e
  (02) Sulfides
  (02.G) Sulfarsenites, sulfantimonites, sulfbismuthites
  (02.GC) Poly-sulfarsenites
  
Crystal system: Trigonal System
Point group (H-M): 3m (or 3 2/m) — hexagonal-scalenohedral
Unit cell: a = 4.191(2) Å, c = 39.60(3) Å; Z = 3
Crystal Habit: As thin tablets, in aggregates, to 2 mm across.
  
Color: Silvery gray; white with yellowish tint, in reflected light,.
Diaphaneity: Opaque
Luster: Metallic
Hardness (Mohs): 2
Measured Density: 8.096 (calculated) g/cm3
Cleavage: Perfect, on {001}
Streak: Gray
  
Geologic Setting: In a hydrothermal deposit in sediments, near their contact with a granite intrusion.
Mineral Association: Arsenopyrite, stannite, tetrahedrite, wittite, laitakarite, selenian cosalite, cassiterite, wolframite.
  

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