General Information:
Chemical Formula:
Tl2Sb6As4S16
Composition:
(Molecular Weight = 1,952.01 gm)
Thallium 20.94 % Tl
Antimony 37.42 % Sb
Arsenic 15.35 % As
Sulfur 26.28 % S
Empirical Formula:
Tl2Sb6As4S16
IMA Status:
Approved IMA 1970
Locality:
Jas Roux, Hautes-Alpes, France.
Name Origin:
Named for Roland Pierrot (1930-), French mineralogist.
Physical Properties:
Color:
grayish black.
Density:
4.97
Diaphaniety:
Opaque
Habits:
Granular - Generally occurs as anhedral to subhedral crystals in matrix., Aggregates - Made of numerous individual crystals or clusters.,
Hardness:
3.5 - Copper Penny
Luster:
Metallic
Streak:
reddish black
More details...