1. Using the edge length of a unit cell, we can calculate the density (p )of the crystal by considering a cubic unit cell as follows.
Substitute the value (3) in (2)
Mass of the unit cell = n x \(\frac{M}{N_A}\)
For a cubic unit cell, all the edge lengths are equal. i.e., a = b = c
Volume of the unit cell = a x a x a = a3
∴Density of the unit cell = ρ = \(\frac{nM}{a^3N_A}\)
