Pentlandita

Structural context

Pentlandite
Crystal System isometricCrystal Class hexoctahedralSpace Group Fm-3m

Chemical context

Stoichiometric formulas

Pentlandite
mindat.org
  • March 13, 2023(NixFey)Σ9S8x+y=9. IMA formula is: (Ni,Fe)9S8. Most samples are Ni-dominant, but some are Fe-dominant. Typical analyses: (Ni4.60Fe4.30Co0.17)Σ=9.07S8.00 (Ni4.16Fe3.63Co1.48)Σ=9.27S8.00 (Ni5.89Fe2.51Co0.53)Σ=8.93S8.00 (Fe4.80Ni4.12Co0.08)Σ=9S8
IMA
  • March 13, 2023(Ni,Fe)9S8
mineralogy.rocks
  • Aug. 30, 2022(Ni,Fe)9S8

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • pale bronze-yellow
  • bronze
  • reddish brown
Color noteOriginal color note from the source
Pale bronze-yellow; bronze; brown; reddish brown when argentian
StreakStreak entities, recognized using a custom trained NER model
  • pale bronze-brown
Streak noteOriginal streak note from the source
Pale bronze-brown
Lustre
Metallic
Fracture
Conchoidal
Transparency
Opaque
Luminescence
None
Tenacity
brittle
Hardness
3.5—4
Measured density
4.6—5
Calculated density
4.956