| Achalaite | (Fe2+,Mn)(Ti,Fe3+,Ta)(Nb,Ta)2O8 |
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| Achyrophanite | (K,Na)3(Fe3+,Ti,Al,Mg)5O2(AsO4)5 |
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| Acmonidesite | (NH4,K,Pb)8NaFe42+(SO4)5Cl8 |
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| Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
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| Adachiite | CaFe3Al6(Si5AlO18)(BO3)3(OH)3(OH) |
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| Adranosite-(Fe) | (NH4)4NaFe23+(SO4)4Cl(OH)2 |
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| Aegirine | NaFe3+Si2O6 |
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| Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
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| Aenigmatite | Na4[Fe102+Ti2]O4[Si12O36] |
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| Aerinite | (Ca5.1Na0.5)(Fe3+,Al,Fe2+,Mg)4(Al,Mg)6[HSi12O36(OH)12][(CO3)1.2(H2O)12] |
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| Aeschynite-(Ce) | (Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6 |
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| Aheylite | (Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2O |
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| Ahrensite | SiFe2O4 |
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| Akaganeite | (Fe3+,Ni2+)8(OH,O)16Cl1.25 · nH2O |
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| Akimotoite | (Mg,Fe2+)SiO3 |
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| Albertiniite | Fe2+(SO3) · 3H2O |
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| Alcantarillaite | [Fe3+0.5(H2O)4][CaAs23+(Fe3+2.5W6+0.5)(AsO4)2O7] |
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| Alcaparrosaite | K3Ti4+Fe3+(SO4)4O(H2O)2 |
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| Allanite-(Ce) | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) |
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| Allanite-(La) | (CaLa)(AlAlFe2+)O[Si2O7][SiO4](OH) |
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| Allanite-(Nd) | (CaNd)(AlAlFe2+)O[Si2O7][SiO4](OH) |
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| Allanite-(Sm) | (CaSm)(AlAlFe2+)O[Si2O7][SiO4](OH) |
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| Allanite-(Y) | (CaY)(AlAlFe2+)O[Si2O7][SiO4](OH) |
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| Allanpringite | Fe33+(PO4)2(OH)3 · 5H2O |
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| Alluaudite | (Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3 |
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| Almandine | Fe32+Al2(SiO4)3 |
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| Almeidaite | PbZn2(Mn,Y)(Ti,Fe3+)18O37(OH,O) |
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| Alterite | Zn2Fe43+(SO4)4(C2O4)2(OH)4 · 17H2O |
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| Aluminocopiapite | Al2/3Fe43+(SO4)6(OH)2 · 20H2O |
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| Aluminocoquimbite | Al2Fe2(SO4)6(H2O)12 · 6H2O |
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| Aluminomagnesiohulsite | (Mg,Fe2+)2(Al,Mg,Sn)(BO3)O2 |
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| Alumoklyuchevskite | K3Cu3(Al,Fe3+)(SO4)4O2 |
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| Amakinite | Fe2+(OH)2 |
|---|
| Amarantite | Fe23+(SO4)2O · 7H2O |
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| Amarillite | NaFe(SO4)2 · 6H2O |
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| Ammoniojarosite | (NH4)Fe33+(SO4)2(OH)6 |
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| Ammoniomagnesiovoltaite | (NH4)2Mg52+Fe33+Al(SO4)12 · 18H2O |
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| Ammoniovoltaite | (NH4)2Fe52+Fe33+Al(SO4)12(H2O)18 |
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| Anandite | (Ba,K)(Fe2+,Mg)3((Si,Al,Fe)4O10)(S,OH)2 |
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| Anapaite | Ca2Fe2+(PO4)2 · 4H2O |
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| Anastasenkoite | CaFe2+(P2O7) |
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| Anatolyite | Na6(Ca,Na)(Mg,Fe3+)3Al(AsO4)6 |
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| Andradite | Ca3Fe23+(SiO4)3 |
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| Andrémeyerite | BaFe22+(Si2O7) |
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| Andymcdonaldite | Fe2TeO6 |
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| Angarfite | NaFe53+(PO4)4(OH)4 · 4H2O |
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| Angelellite | Fe43+(AsO4)2O3 |
|---|
| Ankerite | Ca(Fe2+,Mg)(CO3)2 |
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| Annite | KFe32+(AlSi3O10)(OH)2 |
|---|
| Anzaite-(Ce) | Ce 43+Fe2+Ti6O18 (OH)2 |
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