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Mechanical Engineering · Q309

Engineering Materials

Engineering and GATE · Mechanical Engineering · question 309

Q309

The coordination number of a face centered cubic space lattice is

A.
Six
B.
Twelve
Answer
C.
Eighteen
D.
Twenty

Answer: Option B

Solution

Answer: Option B
Solution:

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