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Iron nitrides are inorganical chemical compounds.
Both iron nitrides are gray powders.
Iron has four nitrides, Fe2N, Fe3N1+x, Fe4N, 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.
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.