Some common Fe minerals and their chemical formulas
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Major Group |
Chemical Formula |
Comments |
Oxides and hydroxides |
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Goethite |
FeOOH |
Common in nature and in distribution systems (DS) |
Lepidochrosite |
FeOOH |
Common in nature and DS |
Ferrihydrite |
Fe(OH)3 |
Rare in nature and DS |
Hematite |
Fe2O3 | Common in nature and DS |
Magnetite |
FeOFe2O3 |
Common in nature and DS |
Carbonates |
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Siderite |
FeCO3 |
Common in nature, found in DS |
Phosphates |
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Vivianite |
Fe3(PO4)2:8H2O |
Common in nature, unknown in DS |
Sulfates |
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Jarosite |
(H,K,Na)Fe3(SO4)2(OH)6 |
Common in nature, ? in DS |
Melanterite |
FeSO4:7H2O |
Common in nature, ? in DS |
Sulfides |
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Pyrite |
Fe2S |
Common in nature and DS |
Mackinawite, Amorphous ferrous sulfide |
FeS | Common in nature and DS |
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