General Information:
Chemical Formula:Ag8SnS6
Composition:(Molecular Weight = 1,174.05 gm)Silver 73.50 %
AgTin 10.11 %
SnSulfur 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
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