General Information:
Chemical Formula:
As2S3
Composition:
(Molecular Weight = 246.04 gm)
Arsenic 60.90 % As
Sulfur 39.10 % S
Empirical Formula:
As2S3
Name Origin:
From the Latin, auripigmentum, in allusion to the vivid golden hue.
Physical Properties:
Cleavage:
[010] Perfect
Color:
lemon yellow, brownish yellow, or orange yellow.
Density:
3.49 - 3.56, Average = 3.52
Diaphaniety:
Transparent to translucent
Habits:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Massive - Fibrous - Distinctly fibrous fine-grained forms., Foliated - Two dimensional platy forms.
Hardness:
1.5-2 - Talc-Gypsum
Luminescence:
None.
Luster:
Pearly
Streak:
pale yellow
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