Cryôlit

Structural context

Cryolite
Crystal System monoclinicSpace Group P21/c

Chemical context

Stoichiometric formulas

Cryolite
mindat.org
  • March 13, 2023Na2NaAlF6
IMA
  • March 13, 2023Na2NaAlF6
mineralogy.rocks
  • Aug. 30, 2022Na3AlF6

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • colourless
  • colourless
          Color noteOriginal color note from the source
          Colourless, white, brown, grey, black; colourless in transmitted light.
          StreakStreak entities, recognized using a custom trained NER model
            Streak noteOriginal streak note from the source
            White
            Lustre
            Vitreous
            Greasy
            Pearly
            Fracture
            Irregular/Uneven
            Transparency
            Transparent
            Translucent
            Tenacity
            brittle
            Hardness
            3—3.5
            Measured density
            2.96—2.98
            Calculated density
            2.973