General Information:
Chemical Formula:
FeAsS
Composition:
(Molecular Weight = 162.83 gm)
Iron 34.30 % Fe
Arsenic 46.01 % As
Sulfur 19.69 % S
Empirical Formula:
Fe3+AsS
IMA Status:
Approved IMA 1960
Name Origin:
Named after the minerals chemical composition.
Physical Properties:
Cleavage:
[110] Distinct
Color:
tin white or light steel gray.
Density:
6.07
Diaphaniety:
Opaque
Habits:
Striated - Parallel lines on crystal surface or cleavage face., Euhedral Crystals - Occurs as well-formed crystals showing good external form., Prismatic - Crystals Shaped like Slende r Prisms (e.g. tourmaline).
Hardness:
5 - Apatite
Luminescence:
None.
Luster:
Metallic
Streak:
black
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