Mineral Information and Data:

Arsenohauchecornite
Ni18Bi3AsS16 [CNMNC approved formula]

Named alludes to its chemical relation to the hauchecornite group.

IMA status : Approved Species 1980 (IMA1978-E)
CLASSIFICATION 
Dana
(8th edition) :
03.02.05.04  
  (03) Sulfides - Sulfosalts
  (03.02) where z/y = 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.02.05) Hauchecornite Group, Complex Ni sulfides (Tetragonal: P4/nnn or I4/mmm)
  
Nickel-Strunz
(10th edition) :
02.BB.10
  (02) Sulfides
  (02.B) Metal Sulfides, M:S > 1:1 (mainly 2:1)
  (02.BB) With Ni, Fe
  
Crystal system: Tetragonal System
Point group (H-M): 4/mmm (or 4/m 2/m 2/m) — ditetragonal-dipyramidal
Unit cell: a = 10.2711Å, c = 10.8070Å
Crystal Habit: Tabular crystals, to 2 cm; in irregular masses.
  
Color: Bronze
Diaphaneity: Opaque
Luster: Metallic, brilliant on fresh surfaces
Measured Density: 6.35 g/cm3
Fracture: Conchoidal
  
Geologic Setting: In hydrothermal Ni–Co–Cu sulfide veins.
Mineral Association: Chalcopyrite, pyrrhotite, gersdorffite, pyrite, gold, nickeline, galena, copper, sperrylite, michenerite, froodite (Vermilion mine, Canada)
  

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