Calcopirite

italian term for this mineral

Structural context

Chalcopyrite
Crystal System tetragonalCrystal Class tetragonal scalenohedralSpace Group I-42d

Chemical context

Stoichiometric formulas

Chalcopyrite
mindat.org
  • March 13, 2023CuFeS2
IMA
  • March 13, 2023CuFeS2
mineralogy.rocks
  • Aug. 30, 2022Cu1+Fe3+S2-2

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • brass yellow
  • tarnish
Color noteOriginal color note from the source
Brass yellow, often with an iridescent tarnish.
StreakStreak entities, recognized using a custom trained NER model
  • greenish black
Streak noteOriginal streak note from the source
Greenish black
Lustre
Metallic
Fracture
Irregular/Uneven
Transparency
Opaque
Luminescence
None
Tenacity
brittle
Hardness
3.5—4
Measured density
4.1—4.3
Calculated density
4.18