Mineral Information and Data:

Antimony
Sb [CNMNC approved formula]

Named from the medieval latin 'antimonium', originally applied to Stibnite.

IMA status : Valid species (Pre-IMA 1748) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
01.03.01.02  
  (01) Native Elements
  (01.03) with semi-metallic and non-metallic elements
  (01.03.01) Arsenic group
  
Nickel-Strunz
(10th edition) :
01.CA.05
  (01) Elements
  (01.C) Metalloids and Nonmetals
  (01.CA) Arsenic group elements
  
Crystal system: Trigonal System
Point group (H-M): 3m (or 3 2/m) — hexagonal-scalenohedral
Unit cell: a = 4.307 Å, c = 11.27 Å
Crystal Habit: Crystals pseudo-cubic or thick tabular; massive, lamellar, radiated
Twinning: Common on {10-14}, polysynthetic or cyclic (fourlings, sixlings)
  
Color: Tin-white
Diaphaneity: Opaque
Luster: Metallic
Hardness (Mohs): 3 to 3.5
Measured Density: 6.69 g/cm3
Cleavage: 4; {0001} perfect, {1011} distinct, {1014} imperfect, {1020} indistinct
Tenacity: Brittle
Fracture: Uneven
Streak: Grey
  
Geologic Setting: In hydrothermal Sb–Ag veins
Mineral Association: Silver, stibnite, allemontite, sphalerite, pyrite, galena, quartz
  

 

Antimony
Origin: Japan
Sample size: 2.5 x 2.1 x 1.6 cm
Photo: Rob Lavinsky

 

Antimony
Origin: Japan
Sample size: 2.5 x 2.1 x 1.6 cm
Photo: Rob Lavinsky

 

Antimony
Origin: Arechuybo, Chihuahua, Mexico
Sample size: 3.5 x 3 x 2 cm
Photo: Tom Loomis

 

Antimony
(zoom-in of above)

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