Question: 4) Some metals exist in different crystal structures depending on the temperature and pressure. The different crystalline forms of an element are called allotropes. Iron

4) Some metals exist in different crystal structures depending on the temperature and pressure. The different crystalline forms of an element are called allotropes. Iron for example exhibits the following crystalline allotropes at 1 atmosphere of pressure:

BCC at high temperatures (ferrite)

FCC at moderate temperatures (austenite)

BCC at low temperature (ferrite)

which is the more dense form of Fe?

FFC or BCC

explain your reasoning!!

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