Aktynolit

Structural context

Actinolite
Crystal System monoclinicCrystal Class prismaticSpace Group C2/m

Chemical context

Stoichiometric formulas

Actinolite
mindat.org
  • Feb. 27, 2025◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
  • March 13, 2023◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22OH2
IMA
  • March 13, 2023◻Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)2
mineralogy.rocks
  • Aug. 30, 2022[box]{Ca2}{Mg4.5-2.5Fe2+0.5-2.5}(Si8O22)(OH)2

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • grey-green
  • green-black
Color noteOriginal color note from the source
Green, green-black, grey-green, or black
StreakStreak entities, recognized using a custom trained NER model
    Streak noteOriginal streak note from the source
    White
    Lustre
    Vitreous
    Silky
    Fracture
    Splintery
    Transparency
    Transparent
    Translucent
    Luminescence
    Nonfluorescent
    Tenacity
    brittle
    Hardness
    5—6
    Measured density
    3.03—3.24
    Calculated density
    3.07