Question

2. Using diagrams, determine whether (111) or (110) planes are more densely packed with atoms for FCC crystal

Answer 1

Answer:

For the (110) plane, there are N110 = 4 × (1/4) + 2 × (1/2) + 2 × 1 = 4 atoms within the unit cell. For the (111) plane there are N111 = 3 × (1/6) + 3 × (1/2) = 2 atoms within the unit cell.