Answer:
The most common crystal structure of diamond is called diamond cubic; on the other hand, sodium chloride has a cubic unit cell.
Explanation:
A diamond cubic lattice can be thought of as two interpenetrating face-centered cubic lattices with one displaced by 1/4 of the diagonal along a cubic cell, or as one lattice with two atoms associated with each lattice point .
Sodium chloride is best thought of as a face-centered cubic (fcc) array of anions with an interpenetrating fcc cation lattice (or vice-versa).
