Seleniu

Structural context

Selenium
Crystal System trigonalCrystal Class trigonal trapezohedralSpace Group P3221

Chemical context

Stoichiometric formulas

Selenium
mindat.org
  • March 13, 2023Se
IMA
  • March 13, 2023Se
mineralogy.rocks
  • Aug. 30, 2022Se

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • gray
  • reddish gray
  • grayish black
    Color noteOriginal color note from the source
    Gray to grayish black, reddish gray, red
    StreakStreak entities, recognized using a custom trained NER model
      Streak noteOriginal streak note from the source
      Red
      Lustre
      Metallic
      Transparency
      Opaque
      Tenacity
      flexible
      Hardness
      2
      Calculated density
      4.809