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Knopit

Structural context

Perovskite
Crystal System orthorhombicCrystal Class orthorhombic dipyramidalSpace Group Pnma

Chemical context

Stoichiometric formulas

Knopite
mindat.org
  • March 13, 2023(Ca,Ce,Na)(Ti,Fe)O3
mineralogy.rocks
  • Aug. 30, 2022(Ca,Ce3+,Na)(Ti4+,Fe3+)O3
Perovskite
mindat.org
  • March 13, 2023CaTiO3
IMA
  • March 13, 2023CaTiO3
mineralogy.rocks
  • Aug. 30, 2022CaTi4+O3

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • dark brown
  • red-brown
      Color noteOriginal color note from the source
      Dark brown, black, red-brown, yellow shades
      StreakStreak entities, recognized using a custom trained NER model
      • colourless
      • greyish white
      Streak noteOriginal streak note from the source
      Colourless, greyish white
      Lustre
      Adamantine
      Metallic
      Sub-Metallic
      Fracture
      Irregular/Uneven
      Sub-Conchoidal
      Transparency
      Transparent
      Translucent
      Tenacity
      brittle
      Hardness
      5.5
      Measured density
      3.98—4.26
      Calculated density
      4.02
      Perovskite