Grünerite

Structural context

Grunerite
Crystal System monoclinicCrystal Class prismaticSpace Group C2/m

Chemical context

Stoichiometric formulas

Grunerite
mindat.org
  • March 13, 2023◻{Fe2+2}{Fe2+5}(Si8O22)(OH)2Grunerite is defined as a monoclinic amphibole belong to the magnesium-iron-manganese amphibole subgroup. It is defined with Fe2+ as the dominant element both in the B and C positions.
IMA
  • March 13, 2023◻Fe2+2Fe2+5Si8O22(OH)2
mineralogy.rocks
  • Aug. 30, 2022[box]Fe2+2Fe2+5Si8O22(OH)2

Physical properties

ColorColor entities, recognized using a custom trained NER model
Color noteOriginal color note from the source
Nd
StreakStreak entities, recognized using a custom trained NER model
Streak noteOriginal streak note from the source
Nd
Lustre
Vitreous
Luminescence
Nonfluorescent
Hardness
5—6