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Iron oxides and their properties

Iron oxides and their properties

Answer:

There are iron oxide, Fe3O4, in fact, is FeO · Fe2O3, magnetic black crystal
There is iron oxide, is iron oxide Fe2O3, reddish brown powder, commonly known as iron red, it can be used as paint pigments
There is iron oxide FeO, black powder, it is unstable, heated in the air, that is quickly oxidized into Fe3O4
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