Mineral Information and Data:

Breithauptite
NiSb [CNMNC approved formula]

Named after the Saxon mineralogist Johann Friedrich August Breithaupt (1791-1873).

IMA status : Valid species (Pre-IMA 1845) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
02.08.11.02  
  (02) Sulfides - Including Selenides and Tellurides
  (02.08) where Am Bn Xp, with (m+n):p=1:1
  (02.08.11) Nickeline Group (Hexagonal: P63/mmc)
  
Nickel-Strunz
(10th edition) :
02.CC.05
  (02) Sulfides
  (02.C) Metal Sulfides, M:S = 1:1 (and similar)
  (02.CC) With Zn, Fe, Cu, Ag, etc.
  
Crystal system: Hexagonal System
Point group (H-M): 6/mmm (or 6/m 2/m 2/m) — dihexagonal-dipyramidal
Unit cell: a = 3.946 Ǻ, c = 5.148 Ǻ
Crystal Habit: Crystals thin tabular; massive; disseminated or arborescent
Twinning: On {1101}
  
Color: Copper-red with a violet tint
Diaphaneity: Opaque
Luster: Metallic
Hardness (Mohs): 5.5
Measured Density: 7.591 to 8.230 g/cm3
Tenacity: Brittle
Fracture: Subconchoidal to uneven
Streak: Reddish brown
  
Geologic Setting: In hydrothermal calcite veins associated with Co–Ni–Ag ores.
Mineral Association: Silver, nickeline, maucherite, cobaltite, ullmannite, tetrahedrite, pyrrhotite,
cubanite, chalcopyrite, sphalerite, galena, calcite
  
Synonyms/varieties: Antimonnicke (of Stromeyer), Briethauptite (of Fröbel)

 

Breithauptite
Origin: Sarrabus, Sardinia, Italy
Sample size: Microscopic image
Photo and Owner: Lou Perloff

 

Breithauptite
Massive rosey bronze with calcite. Ex. Erling Collection
Origin: Cobalt district, Ontario, Canada
Sample size: 7 x 4 x 2 cm
Photo: Tom Loomis

 

Breithauptite
(zoom-in of above)

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