Arfvedsonite Chemical: Na3(Fe,Mg)4FeSi8O22(OH)2. Clades: Sodium amphibole group; Inosilicates; Silicate minerals; Lapidae. rom Related postsDysprosium phosphoricumMarch 10, 2019Cochlearia officinalisMarch 10, 2019NitrogeniumMarch 10, 2019 Previous postRiebeckiteNext postHalloysite