Question

The unit cell of nickel is an fcc lattice. The length its side is 0.352 nm. Calculate the atomic radius of nickel.

Answer 1

For a FCC structure, $4r=a\sqrt{2}$ (along the surface diagonal)

$a=0.352$ $nm$

$r=\frac{a\sqrt{2}}{4}=\frac{0.352\sqrt{2}}{4}=0.12445$ $nm$