Iron Sulfide Cubic
FeS2
Chemical name
Iron Sulfide Cubic
Mineral name
Pyrite
Chemical formula
FeS2
Crystal system
cubic
Crystal Class
cubic-disdodecahedron (2/m -3)
Space Group
Pa-3
Unit cell
a [Å]:5.42
b [Å]:5.42
c [Å]:5.42
Molecular weight [g/mol]
87,91
Formula units
Z=4
Twinning
penetration and contact twinning
Mohs hardness
6 - 6.5
Density [g/cm3]
4.8 - 5
Cleavage
indistinct on {001}
Fracture / Tenacity
brittle, uneven, sometimes conchoidal
Color
pale brass-yellow reflective, tarnishes darker
Streak
greenish- to brownish-black
Transparency
opaque
Other
paramagnetic