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Piroluzit

Structural context

Pyrolusite
Crystal System tetragonalCrystal Class ditetragonal dipyramidalSpace Group P42/mnm

Chemical context

Stoichiometric formulas

Pyrolusite
mindat.org
  • March 13, 2023Mn4+O2
IMA
  • March 13, 2023MnO2
mineralogy.rocks
  • Aug. 30, 2022Mn4+O2

Physical properties

ColorColor entities, recognized using a custom trained NER model
    • dark grey
    Color noteOriginal color note from the source
    Black or very dark grey.
    StreakStreak entities, recognized using a custom trained NER model
    • bluish-black
    Streak noteOriginal streak note from the source
    Black to bluish-black.
    Lustre
    Metallic
    Dull
    Earthy
    Fracture
    Irregular/Uneven
    Transparency
    Opaque
    Tenacity
    brittle
    Hardness
    2—6.5
    Measured density
    5.04—5.08
    Calculated density
    5.189
    Pyrolusite