Ilvait

Structural context

Ilvaite
Crystal System orthorhombicSpace Group Pnma

Chemical context

Stoichiometric formulas

Ilvaite
mindat.org
  • March 13, 2023CaFe3+Fe2+2(Si2O7)O(OH)
IMA
  • March 13, 2023CaFe3+Fe2+2O(Si2O7)(OH)
mineralogy.rocks
  • Aug. 30, 2022CaFe2+2Fe3+OSi2O7(OH)

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • iron-black
  • dark grayish black
Color noteOriginal color note from the source
Iron-black, dark grayish black
StreakStreak entities, recognized using a custom trained NER model
        Streak noteOriginal streak note from the source
        Black, inclining to green or brown
        Lustre
        Sub-Metallic
        Fracture
        Irregular/Uneven
        Transparency
        Opaque
        Tenacity
        brittle
        Hardness
        5.5—6
        Measured density
        3.99—4.05
        Calculated density
        4.064