Antimonite
Sb2S3
Chemical name
Antimonite
Mineral name
Antimonite
Chemical formula
Sb2S3
Crystal system
Orthorhombic
Space Group
Pbnm
Unit cell
a [Å]:11,229
b [Å]:11,31
c [Å]:3,8389
Twinning
Rare
Mohs hardness
2
Density [g/cm3]
4,625 g·cm-3
Cleavage
Perfect and easy on {010}; imperfect on {100} and {110}
Fracture / Tenacity
Highly flexible but not elastic; slightly sectile
Color
Lead-gray, tarnishing blackish or iridescent; in polished section, white
Streak
Similar to color
Other
Anisotropism: Strong
Solubility in water
decomposed with hydrochloric acid