Question $25(10$ points$)$

Determine the planar density and packing fraction for FCC nickel in the $(100)$ and $(110)$ planes. Which, if any, of these planes is close packed?

Packing fraction for $(100)$ plan

A

$($Format

x$.$xxx$)$

Packing fraction for $(110)$ plan

$$ A

$($Format $x.x)$

Planar density for for $(100)$ plan

$$

$E\frac{16}{c}{m}^2($Format x$.$xxxx E$16/$cm$^2)$

Planar density for for $(110)$ plan

$$ A $E\frac{16}{c}{m}^2($Format $x.E\frac{16}{c}{m}^2)$