Wakabayashilite

General Information:
 Chemical Formula:
(As,Sb)11S18
 Composition:
(Molecular Weight = 1,530.10 gm)
Antimony 21.88 % Sb
Arsenic 40.40 % As
Sulfur 37.72 % S 
 Empirical Formula:
As8.25Sb2.75S18
 IMA Status:
Approved IMA 1969
Physical Properties:
 Cleavage:
[100] Perfect, [010] Perfect, [101] Perfect
 Color:
golden yellow or lemon.
 Density:
3.98
 Hardness:
1.5 - Between Talc and Gypsum
 Luster:
Silky
 Streak:
orange
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