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The existence of two or more crystal structures for any substance, depending on temperature, is known as _________

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The existence of two or more crystal structures for any substance, depending on temperature, is known as _________

(a) Allotropy

(b) Solidification

(c) Solubility

(d) Interstices

This question was addressed to me in an interview.

The doubt is from Iron-Carbon System and their Alloys in section Constitution of Alloys and Phase Diagrams of Engineering Material & Metallurgy

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Correct option is (a) Allotropy

To elaborate: Allotropy is defined as the possibility of the existence of two or more different crystal structures for a substance depending on temperature. This phenomenon is known as polymorphism. Pure iron is an allotropic metal.

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