Question

What fraction of one edge centred octahedral void lies in one unit cell of FCC?

Options

• `1/3`

• `1/4`

• `1/12`

• `1/2`

Answer 1

`\bb(1/4)`

Explanation:

We know that the edge-centred octahedral void is shared between four unit cells. Therefore, the per-unit-cell contribution is `1/4`.