Iron β is a solid phase of iron still unknown to science. The only difference between it and ordinary iron is that Iron β forms a crystal with an fcc unit cell and a lattice constant a=0.352 nm. Calculate the density of Iron β Round your answer to 3 significant digits. cm

8.60 g/cm³

Explanation:

In the lattice structure of iron, there are two atoms per unit cell. So:

where an and A is the atomic mass of iron.

Therefore:

This implies that:

  =

Assuming that there is no phase change gives:

  = 8.60 g/m³

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