Bornite
Cu5FeS4
|
Chemical name
Bornite |
|
Mineral name
Peacock Ore |
|
Chemical formula
Cu5FeS4 |
|
Crystal Class
band
H-M symbol: (2/m 2/m 2/m) |
|
Space Group
Pbca (Pseudo cubic at roomtemp.) (Cubic at > 228° A=5.50Å) |
|
Unit cell
a [Å]:10.95 b [Å]:21.862 c [Å]:10.95 |
|
Molecular weight [g/mol]
501.88 |
|
Formula units
Z=16 |
|
Twinning
Penetration twins on [111] |
|
Mohs hardness
3 - 3.25 |
|
Density [g/cm3]
5.06 - 5.09 |
|
Cleavage
Poor on [111] |
|
Fracture / Tenacity
Brittle |
|
Color
Copper red, bronze brown, purple |
|
Streak
Grayish black |
|
Luster
Metallic if fresh, iridescent tarnish |
|
Refractive Index
Opaque |
