Copper Iron Sulfide
CuFeS2
Chemical name
Copper Iron Sulfide
Mineral name
Chalcopyrite
Chemical formula
CuFeS2
Crystal system
tetragonal
Crystal Class
tetragonal-scalenohedral (-4 2 m)
Space Group
/-42d
Unit cell
a [Å]:5.289
b [Å]:5.289
c [Å]:10.423
Molecular weight [g/mol]
183,51
Formula units
Z=4
Twinning
on {112} and {012} penetration and cyclic twins
Mohs hardness
3.5 - 4
Density [g/cm3]
4.3
Cleavage
indistinct on {011} and {111}
Fracture / Tenacity
brittle, uneven, conchoidal
Color
brass yellow
Streak
greenish black
Transparency
opaque
Other
magnetic on heating