Stibnite

Bismuthinite-Stibnite Series. Possibly also polymorphous with UM1996-35-S:Sb. The most common antimony sulphide. An important Sb ore mineral.

Structural context

Stibnite
Crystal System orthorhombicSpace Group Pnma
a10.508—11.355 (11.1943)
b3.7409—11.33 (4.3838)
c3.83—11.26 (10.5935)
alpha90
beta90
gamma90
volume415.854—493.98 (478.2169)

Based on 27 measurements

Chemical context

Stoichiometric formulas

Stibnite
mindat.org
  • March 13, 2023Sb2S3
IMA
  • March 13, 2023Sb2S3
mineralogy.rocks
  • Aug. 30, 2022Sb2S3

Elements recorded on EPMA

26
S
26
Sb
5
Bi
1
As

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • lead-gray
  • pale blue
Color noteOriginal color note from the source
Lead-gray with pale blue tint
StreakStreak entities, recognized using a custom trained NER model
  • lead grey
Streak noteOriginal streak note from the source
Lead grey
Lustre
Metallic
Fracture
Sub-Conchoidal
Transparency
Opaque
Tenacity
flexible
Hardness
2
Calculated density
4.625