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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