Gehlenit

Structural context

Gehlenite
Crystal System tetragonalCrystal Class tetragonal scalenohedralSpace Group P-421m

Chemical context

Stoichiometric formulas

Gehlenite
mindat.org
  • Nov. 16, 2024Ca2Al[AlSiO7]
  • March 13, 2023Ca2Al(AlSiO7)
IMA
  • March 13, 2023Ca2Al(SiAl)O7
mineralogy.rocks
  • Aug. 30, 2022Ca2Al(AlSiO7)

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • yellow-brown
  • colourless
  • greenish grey
Color noteOriginal color note from the source
Yellow-brown, colourless, greenish grey
StreakStreak entities, recognized using a custom trained NER model
  • grey-white
Streak noteOriginal streak note from the source
White, grey-white
Lustre
Vitreous
Greasy
Hardness
5—6