There are several different iron oxides, with different chemical formulas and properties. The most common ones are:
* Iron(II) oxide (FeO), also known as ferrous oxide
* Iron(III) oxide (Fe₂O₃), also known as ferric oxide or rust
* Iron(II,III) oxide (Fe₃O₄), also known as magnetite
The specific name for the compound will depend on the ratio of iron and oxygen atoms in the molecule.
