Ferruginous redirects here. For the bird, see
Ferruginous Hawk Altogether there are sixteen known
iron oxides. These compounds are either oxides (
Wüstite,
Hematite, β-Fe2O3,
Maghemite, γ-Fe2O3, ε-Fe2O3,
Magnetite,
Ferrihydrite), or hydroxides and oxide-hydroxides (
Goethite,
Akaganéite,
Lepidocrocite,
Feroxyhyte, Bernalite,
Schwertmannite and green rusts). Some of these oxides are used in
ceramic applications, particularly in
glazing. Many metal oxides provide the colours in glazes after being fired at high temperatures.
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