General Information:
Chemical Formula:
TlPbAs2SbS6
Composition:
(Molecular Weight = 875.57 gm)
Thallium 23.34 % Tl
Antimony 13.91 % Sb
Arsenic 17.11 % As
Lead 23.66 % Pb
Sulfur 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
More details...