Glaukofan

Structural context

Glaucophane
Crystal System monoclinicCrystal Class prismaticSpace Group C2/m

Chemical context

Stoichiometric formulas

Glaucophane
mindat.org
  • March 13, 2023◻[Na2][Mg3Al2]Si8O22(OH)2Glaucophane is defined as a member of the glaucophane group with Mg>Fe2+ in the C2+ position and (OH) in the W position.
IMA
  • March 13, 2023◻Na2(Mg3Al2)Si8O22(OH)2
mineralogy.rocks
  • Aug. 30, 2022[box]Na2(Mg3Al2)Si8O22(OH)2

Physical properties

ColorColor entities, recognized using a custom trained NER model
    • lavender-blue
    Color noteOriginal color note from the source
    Grey to lavender-blue.
    StreakStreak entities, recognized using a custom trained NER model
    • pale grey
    • bluish-grey
    Streak noteOriginal streak note from the source
    Pale grey to bluish-grey.
    Lustre
    Vitreous
    Fracture
    Irregular/Uneven
    Conchoidal
    Transparency
    Translucent
    Luminescence
    Nonfluorescent
    Tenacity
    brittle
    Hardness
    5—6
    Measured density
    3.08—3.22
    Calculated density
    3.123