General Information:
Chemical Formula:TlHgSb4S7
Composition:(Molecular Weight = 1,116.44 gm)Thallium 18.31 %
TlMercury 17.97 %
HgAntimony 43.62 %
SbSulfur 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
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