Iron nitride

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Iron nitrides are inorganic chemical compounds of iron and nitrogen.

Physical properties[edit]

All iron nitrides are gray powders.

Chemical properties[edit]

Iron has five nitrides, Fe2N, Fe3N1+x, Fe4N, Fe7N3 and Fe16N2. They are crystalline, metallic solids. Group 7 and group 8 transition metals form nitrides that decompose at relatively low temperatures - iron nitride, Fe2N decomposes under loss of molecular nitrogen at about above 400 °C and formation of lower-nitrogen content iron nitrides. They are insoluble in water.

Health hazards[edit]

When heated to decomposition, or exposed to humidity, iron nitride may emit toxic fumes of ammonia. It is considered a moderate explosion hazard. Inhalation of iron nitride dust or powder may cause irritation to the respiratory system and possibly acute iron poisoning or iron pneumoconiosis.

Research applications[edit]

Colloidal solution of magnetic iron nitride nanoparticles is a way to create ferrofluids.

Iron nitrides also make the strongest naturally magnetic material.[1]