Answer / Ranjana Kutiyal

Allotrope refers to different forms of an element having the same chemical composition but a different crystal structure. For iron, it exists in three main allotropes: Ferrite (alpha-iron) with a body-centered cubic structure at room temperature, Austrite (gamma-iron) with a face-centered cubic structure above 912°C, and Martensite which can form during transformation from austenite.

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