The arfvedsonite root name group includes:
arfvedsonite:
NaNa2(Fe2+4Fe3+)Si8O22(OH)2
magnesio-arfvedsonite:
NaNa2(Mg4Fe3+)Si8O22(OH)2
potassic-arfvedsonite:
KNa2(Fe2+4Fe3+)Si8O22(OH)2
potassic-magnesio-arfvedsonite:
KNa2(Mg4Fesup>3+)Si8O22(OH)2
potassic-magnesio-fluoro-arfvedsonite:
KNa2(Mg4Fe3+)Si8O22F2
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