Gourt Home::Gourt :: Stibnite
- align=center bgcolor="#9966FF" | Stibnite | - align=center |
- align=center bgcolor="#9966FF" | General | - | Category | Mineral | - | Chemical formula | antimony sulfide (Sb2S3) | - align="center" bgcolor="#9966FF" | Identification | - | Colour | Steel gray to dull gray. Black iridiscent tarnish may be present. | - | Crystal habit | Massive, radiating and elongated crystals. Massive and granular. | - | Crystal system | Orthorhombic | - | Cleavage | Perfect | - | Fracture | Small-scale subconchoidal | - | Mohs Scale hardness | 2 | - | Luster | Splendent on fresh crystals surfaces, otherwise metallic | - | Refractive index | Opaque | - | Pleochroism | N/A | - | Streak | Similar to colour | - | Specific gravity | 4.56 - 4.62 | - | Fusibility | ? | - | Solubility | Souluble in hydrochloric acid | - align="center" bgcolor="#9966FF" | Major varieties | - | Metastibnite | Earthy, reddish deposits |
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Stibnite is the most important source for the rare metal antimony. It is soluble in hydrochloric acid, and is tarnished by potassium hydroxide solution.
Small deposits of Stibnite are common, large ones are rare. It occurs in Canada, Mexico, Peru, Japan, China, Germany, Romania, Italy, France, England, Algeria, and Kalimantan, Borneo. In the United States it is found in Arkansas, Idaho, Nevada, California, and Alaska. Large iridescent stibnite crystals are found in Japan.
See also
Antimonide minerals | Sulfide minerals | Antimony compounds
Estibina | Antimonit | Stibnit | Stibnite | Stibniet | Antimonit
"Stibnite"