General Information:
Chemical Formula:
TlHgSb4S7
Composition:
(Molecular Weight = 1,116.44 gm)
Thallium 18.31 % Tl
Mercury 17.97 % Hg
Antimony 43.62 % Sb
Sulfur 20.11 % S
Empirical Formula:
TlHgSb4S7
IMA Status:
Approved IMA
Locality:
Hemlo gold deposit, near Marathon, Ontario, Canada.
Name Origin:
Named for David J. Vaughan (1946-), English mineralogist.
Physical Properties:
Cleavage:
None
Color:
black.
Diaphaniety:
Opaque
Habits:
Anhedral Grains - Granular minerals without the expression of crystal shapes, Microscopic Crystals - Crystals visible only with microscopes.,
Hardness:
3-3.5 - Calcite-Copper Penny
Luster:
Metallic
Streak:
black
More details...