Natroalunite-1c

Structural context

Natroalunite
Crystal System trigonalCrystal Class ditrigonal pyramidalSpace Group R3m

Chemical context

Stoichiometric formulas

Natroalunite-1c
mindat.org
  • March 13, 2023NaAl3(SO4)2(OH)6
Natroalunite
mindat.org
  • March 13, 2023NaAl3(SO4)2(OH)6
IMA
  • March 13, 2023NaAl3(SO4)2(OH)6
mineralogy.rocks
  • Aug. 30, 2022NaAl3(SO4)2(OH)6

Physical properties

ColorColor entities, recognized using a custom trained NER model
    • grayish
    • yellowish
    • reddish
    • red-brown
    • colourless
    Color noteOriginal color note from the source
    White, grayish, yellowish, reddish, red-brown; colourless in transmitted light.
    StreakStreak entities, recognized using a custom trained NER model
      Streak noteOriginal streak note from the source
      White
      Lustre
      Vitreous
      Pearly
      Fracture
      Irregular/Uneven
      Splintery
      Conchoidal
      Transparency
      Transparent
      Tenacity
      brittle
      Hardness
      3.5—4
      Measured density
      2.6—2.9
      Calculated density
      2.819