Iron changes its crystal structure from body contred to cubic close backed structure when heated to 916°C. Calculate the ratio of the density of the BCC crystal to that of CCP crystal. Assume that the metallic radius of the atom does not change.
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https://www.meritnation.com/ask-answer/question/iron-changes-its-crystal-structure-from-body-contred-to-cubi/the-solid-state/8464363
https://www.meritnation.com/ask-answer/question/iron-changes-its-crystal-structure-from-body-contred-to-cubi/the-solid-state/8464363