General Information:
Chemical Formula:TlPbAs2SbS6
Composition:(Molecular Weight = 875.57 gm)Thallium 23.34 %
TlAntimony 13.91 %
SbArsenic 17.11 %
AsLead 23.66 %
PbSulfur 21.97 %
S Empirical Formula: TlPbAs2SbS6
IMA Status:Approved IMA (Dana # Added)
Locality:Lengenbach, Binntal, Switzerland.
Name Origin:Named after Franz Jentsch (1868-1908), head of the Binn syndicate that worked the sulfosalt deposit at the Lengenbach quarry.
Physical Properties: Cleavage:[101] Perfect
Color:black or dark red.
Density:5.24
Diaphaniety:Opaque
Hardness:2-2.5 - Gypsum-Finger Nail
Luster:Sub Metallic
Streak:dark red
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