Pirrotita

Structural context

Pyrrhotite
Crystal System monoclinicSpace Group C2/c

Chemical context

Stoichiometric formulas

Pirrotita
mindat.org
  • March 13, 2023Fe7S8
Pyrrhotite
mindat.org
  • March 13, 2023Fe1-xSAlso given as Fe1-x (x = 0 to 0.17). The various polytypes known have slightly different stoichiometries.
IMA
  • March 13, 2023Fe7S8
mineralogy.rocks
  • Aug. 30, 2022Fe2+5Fe3+2S2-8

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • bronze brown
  • dark brown
  • bronze red
Color noteOriginal color note from the source
Bronze brown, bronze red, or dark brown
StreakStreak entities, recognized using a custom trained NER model
  • dark grayish black
Streak noteOriginal streak note from the source
Dark grayish black
Lustre
Metallic
Fracture
Sub-Conchoidal
Transparency
Opaque
Luminescence
None
Hardness
3.5—4
Measured density
4.58—4.65
Calculated density
4.69