Greigit

Structural context

Greigite
Crystal System isometricCrystal Class hexoctahedralSpace Group Fd-3m

Chemical context

Stoichiometric formulas

Greigite
mindat.org
  • March 13, 2023Fe2+Fe3+2S4
IMA
  • March 13, 2023Fe2+Fe3+2S4
mineralogy.rocks
  • Aug. 30, 2022Fe2+Fe3+2S2-4

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • metallic pinkish
  • metallic blue
  • sooty black
Color noteOriginal color note from the source
Metallic pinkish, tarnishing to a metallic blue, sooty black when amorphous
StreakStreak entities, recognized using a custom trained NER model
    Streak noteOriginal streak note from the source
    Black
    Lustre
    Metallic
    Earthy
    Transparency
    Opaque
    Luminescence
    None
    Hardness
    4—4.5
    Calculated density
    4.079