Ferrate
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Ferrate loosely refers to a material that can be viewed as containing anionic iron complexes. The term ferrate derives from Latin ferrum 'iron'.
Examples include tetrachloroferrate ([FeCl4]2−), oxyanions (e.g. FeO2−
4), and the organoferrates, including highly reduced tetracarbonylferrate ([Fe(CO)4]2−) salts.[1][page needed] Although rarely studied, ferrate(V) [FeO4]3− and ferrate(IV) [FeO4]4− oxyanions of iron also exist. These too are called ferrates.[2]
- Ferrates
Disodium salt of tetracarbonylferrate![Structure of ferrate(VI), [FeO4]2−](//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Ferrate_ion.svg/250px-Ferrate_ion.svg.png)
Structure of ferrate(VI), [FeO4]2−![1-Butyl-3-methylimidazolium salt of [FeCl4]−](//upload.wikimedia.org/wikipedia/commons/thumb/4/45/1-Butyl-3-methylimidazolium_tetrachloroferrate.svg/250px-1-Butyl-3-methylimidazolium_tetrachloroferrate.svg.png)
1-Butyl-3-methylimidazolium salt of [FeCl4]−
![1-Butyl-3-methylimidazolium salt of [FeCl4]−](#/media/File:1-Butyl-3-methylimidazolium_tetrachloroferrate.svg)
-2D.png)
Ferrate(VI) is a strong oxidizer,[3] used in water purification[4] and battery technology.[5][6]