Fluoro-potassic-magnesio-arfvedsonite

Structural context

Potassic-magnesio-fluoro-arfvedsonite
Crystal System monoclinicCrystal Class prismaticSpace Group C2/m

Chemical context

Stoichiometric formulas

Fluoro-potassic-magnesio-arfvedsonite
mindat.org
  • March 13, 2023[(K,Na)][Na2][Mg4Fe3+][Si8O22][(F,OH)2]
Potassic-magnesio-fluoro-arfvedsonite
mindat.org
  • March 13, 2023[(K,Na)][Na2][Mg4Fe3+][Si8O22][(F,OH)2]The arfvedsonite group minerals are sodium amphiboles defined with A(Na+K+2Ca)> 0.5 apfu and 0.5 apfu < C(Al+Fe3++2Ti) < 1.5 apfu with Fe as the dominant element in the C3+ position. Potassic-magnesio-fluoro-arfvedsonite is defined with A position: K dominant C2+ position: Mg dominant C3+ position: Fe dominant W position: F dominant
IMA
  • March 13, 2023KNa2(Mg4Fe3+)Si8O22F2
mineralogy.rocks
  • Aug. 30, 2022KNa2(Mg4Fe3+)Si8O22(F,OH)2

Physical properties