Question

How many lattice points belong to a face centered cubic unit cell?

• A. 1
• B. 2
• C. 4
• D. 3

Answer 1

Answer: (C)

4

Answer 2

In face centred cubic lattice, the atoms are present at eight corners of faces and one each at 6 faces. $\therefore$ Lattice points belonging to face centred cubic unit cell = $8 \, \times \, \frac{1}{8} \, + 6 \, \times \frac{1}{2} \, = \, 4$