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Question
The coordination number of a face centered cubic space lattice is
Options:
A .  Six
B .  Twelve
C .  Eighteen
D .  Twenty
Answer: Option B
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

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