The coordination number of a face centered cubic space lattice is
A
Six
B
Twelve
C
Eighteen
D
Twenty
Correct Answer: Twelve
The face-centered cubic (fcc) has a coordination number of 12 and contains 4 atoms per unit cell.
The body-centered cubic (bcc) has a coordination number of 8 and contains 2 atoms per unit cell.
The simple cubic has a coordination number of 6 and contains 1 atom per unit cell