Ferrate

 ( Iron Compounds ) 

Ferrate loosely refers to a material that can be viewed as containing anionic iron complexes. The term ferrate derives .

Examples include tetrachloroferrate (FeCl₄²⁻), oxyanions (e.g. ), and the organoferrates, including highly reduced tetracarbonylferrate (Fe(CO)₄²⁻) salts. Although rarely studied, ferrate(V) FeO₄³⁻ and ferrate(IV) FeO₄⁴⁻ of iron also exist. These too are called ferrates.

File:Disodium tetracarbonylferrate.png|Disodium salt of tetracarbonylferrate File:Ferrate ion.svg|Structure of ferrate(VI), FeO₄²⁻ File:1-Butyl-3-methylimidazolium tetrachloroferrate.svg|1-Butyl-3-methylimidazolium salt of FeCl₄⁻ File:Potassium-trioxalatoferrate(III)-2D.png|Potassium tris(oxalato)ferrate

Ferrate(VI) is a strong oxidizer, used in water purification and battery technology.

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