Question

Show that in a cubic close packed structure, eight tetrahedral voids are present per unit cell.

Answer 1

In ccp, each cube consists of eight cubic components. Number of atoms per unit cell in ccp is

Position of tetrahedral Voids = At the centre of each cubic component Number of tetrahedral voids per unit cell in cubic close packing = 8×1=8 Number of tetrahedral Voids = 8.

Answer 2

[Hint :Draw structure and discuss]