Find the void volume of bec unit cell in $\mathrm{cm}^3$ if volume of unit cell is $1.5 \times 10^{-22}…
Find the void volume of bec unit cell in $\mathrm{cm}^3$ if volume of unit cell is $1.5 \times 10^{-22} \mathrm{~cm}^3$.
$4.8 \times 10^{-23}$
$3.6 \times 10^{-23}$
$2.4 \times 10^{-23}$
$1.2 \times 10^{-23}$
Solution
Volume of unit cell $=\mathrm{a}^3=1.5 \times 10^{-22} \mathrm{~cm}^3$
Void volume of bec unit cell
$=0.32 \times 1.5 \times 10^{-22} \mathrm{~cm}^3=4.8 \times 10^{-23} \mathrm{~cm}^3$
($\because$ Percentage of void volume in bec unit cell $=32 \%$)