Alomite

Structural context

Sodalite
Crystal System isometricCrystal Class hextetrahedralSpace Group P-43n

Chemical context

Stoichiometric formulas

Alomite
mindat.org
  • March 13, 2023Na8(Al6Si6O24)Cl2
Sodalite
mindat.org
  • March 13, 2023Na4(Si3Al3)O12ClSome K substitutes for Na in the grey-white Afghan sodalites. Hackmanite was originally defined as containing S. The brilliant yellow fluorescence arises from a disulfide ion with a negative charge replacing the Cl.
IMA
  • March 13, 2023Na4(Si3Al3)O12Cl
mineralogy.rocks
  • Aug. 30, 2022Na4Si3Al3O12Cl

Physical properties

ColorColor entities, recognized using a custom trained NER model
Color noteOriginal color note from the source
All colours
StreakStreak entities, recognized using a custom trained NER model
    Streak noteOriginal streak note from the source
    White
    Lustre
    Vitreous
    Greasy
    Fracture
    Sub-Conchoidal
    Transparency
    Transparent
    Translucent
    Tenacity
    brittle
    Hardness
    5.5—6
    Measured density
    2.27—2.33
    Calculated density
    2.31