The magnesium-iron-manganese amphibole subgroup includes:
Anthophyllite Root Name Group
anthophyllite:
☐Mg2Mg5Si8O22(OH)2
ferro-anthophyllite:
Fe2+2Fe2+2Si8O22(OH)2
cummingtonite:
☐Mg2Mg5Si8O22(OH)2
Gedrite Root Name Group
ferro-gedrite:
☐Fe2+2(Fe2+3Al2)(Si6Al2)O22(OH)2
gedrite:
☐Mg2(Mg3Al2)(Si6Al2)O22(OH)2
grunerite:
☐Fe2+2Fe2+5Si8O22(OH)2
Suenoite Root Name Group
clino-suenoite:
☐Mn2+2Mg5Si8O22(OH)2
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