General Information:
Chemical Formula:
Pb21Sb23S55Cl
Composition:
(Molecular Weight = 8,950.53 gm)
Antimony 31.29 % Sb
Lead 48.61 % Pb
Sulfur 19.70 % S
Chlorine 0.40 % Cl
Empirical Formula:
Pb21Sb23S55Cl
IMA Status:
Approved IMA 1969
Locality:
Giant property, Yellowknife, NWT, Canada.
Name Origin:
Named for Alexander S. Dadson (1906-1958), Canadian mineralogist.
Physical Properties:
Color:
lead gray or gray.
Density:
5.68 - 5.76, Average = 5.72
Diaphaniety:
Opaque
Habits:
Fibrous - Crystals made up of fibers., ,
Hardness:
2.5 - Finger Nail
Luster:
Metallic
Streak:
black
More details...