General Information:
Chemical Formula:
Ag8SnS6
Composition:
(Molecular Weight = 1,174.05 gm)
Silver 73.50 % Ag
Tin 10.11 % Sn
Sulfur 16.39 % S
Empirical Formula:
Ag8SnS6
Environment:
Forms a series with argyrodite,
Locality:
Aullagas near Chayanta, northwest of Colquechaca, Bolivia.
Name Origin:
Named after Frederick A. Canfield (1849-1926), American mining engineer and mineral collector.
Physical Properties:
Cleavage:
None
Color:
black.
Density:
6.28
Diaphaniety:
Opaque
Habits:
Twinning Common - Crystals are usually twinned., Pseudo Cubic - Crystals show a cubic outline., Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Hardness:
2.5 - Finger Nail
Luster:
Metallic
Streak:
grayish black
More details...