Question

What is the ratio of closed packed atoms to tetrahedral holes in cubic close packing?

• A. 1 : 1
• B. 1 : 2
• C. 1 : 3
• D. 2 : 1

Answer 1

Answer: (B)

Let number of atoms per unit cell = n for ccp
Then number of tetrahedral voids = 2n
Ratio = 1 : 2