Aegirin-Augit

Structural context

Aegirine-augite
Crystal System monoclinicCrystal Class prismaticSpace Group C2/c

Chemical context

Stoichiometric formulas

Aegirin-Augit
mindat.org
  • March 13, 2023(Na,Ca)(Fe3+,Fe2+,Mg,Al)Si2O6
Aegirine-augite
mindat.org
  • March 13, 2023(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6a+b+c+d = 1 e+f+g=h = 1 a = e+f 0.2 ≤ a ≤ 0.8 e > f
IMA
  • March 13, 2023(Ca,Na)(Fe3+,Mg,Fe2+)Si2O6
mineralogy.rocks
  • Aug. 30, 2022(Na,Ca)(Fe3+,Fe2+,Mg,Al)Si2O6

Physical properties

Hardness
6