Canfieldite
Mineral Ag8SnS6
About it
Steel grey silver-tin sulfide, often as octahedron-like crystals; the tin partner of argyrodite. Found in Bolivian silver-tin veins; named for Frederick Canfield.
- Type
- Mineral
- Group
- Sulfide, argyrodite group
- Formula
- Ag8SnS6
- Hardness (Mohs)
- 2.5
- Specific gravity
- 6.2–6.3
- Streak
- greyish black
- Lustre
- metallic
- Crystal system
- Orthorhombic
- Colours
- steel grey with a reddish tint, black tarnish
- Transparency
- opaque
- Cleavage and fracture
- none; uneven fracture
Typical values: real specimens vary. For more, see mindat.org.