General Information:
Chemical Formula:
Ag5SbS4
Composition:
(Molecular Weight = 789.36 gm)
Silver 68.33 % Ag
Antimony 15.42 % Sb
Sulfur 16.25 % S
Empirical Formula:
Ag5SbS4
Name Origin:
Named after the Austrian Mining Director engineer, Archduke Stephan (1817-1867).
Physical Properties:
Cleavage:
[010] Imperfect, [021] Poor
Color:
lead gray or black.
Density:
6.2 - 6.3, Average = 6.25
Diaphaniety:
Opaque
Habits:
Pseudo Hexagonal - Crystals show a hexagonal outline., Tabular - Form dimensions are thin in one direction., Massive - Uniformly indistinguishable crystals forming large masses.
Hardness:
2-2.5 - Gypsum-Finger Nail
Luminescence:
None.
Luster:
Metallic
Streak:
black
More details...