What type of unit cell do ccp and hcp structures possess?

Number of particles in the unit cells of ccp and hcp structures are _______ and ________, respectively.

Calculate the number of particles in unit cells of ccp and hcp structures with identical particles.

How many atoms are present per unit cell in a hcp structure?

Which of the following comments are not true for hcp and ccp structures? In both cases-

Derive packing efficiency of ccp and hcp structure

How many voids are present per unit cell of hcp structure ?

What are the packing efficiencies in ccp and hcp structures of particles?

If the total number of atoms per unit cell in an hcp structure and a bcc structure gets halved, then ratio of percentage voids in hcp and bcc structures is