Jankovicite

General Information:
 Chemical Formula:
Tl5Sb9(As,Sb)4S22
 Environment:
In the Sb-poor, As-rich, and Tl-rich zone of the Crven Dol mine.
 IMA Status:
Approved IMA
 Locality:
Crven Dol mine, Allchar, Macedonia.
 Name Origin:
For Prof. S. Jankovic (1925- ) in recognition of his work on the mineralogy and geology of Allchar.
Physical Properties:
 Cleavage:
[001] Perfect, [010] Perfect, [100] Perfect
 Color:
black.
 Density:
5.08
 Diaphaniety:
Opaque
 Habits:
Tabular - Form dimensions are thin in one direction., ,
 Hardness:
2 - Gypsum
 Luminescence:
Non-fluorescent.
 Luster:
Metallic
 Streak:
violet brown
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