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Mechanical Engineering · Q16

Engineering Materials

Engineering and GATE · Mechanical Engineering · question 16

Q16

Closed packed hexagonal space lattice is found in

A.
Zinc, magnesium, cobalt, cadmium, antimony and bismuth
Answer
B.
Gamma-iron, aluminium, copper, lead, silver and nickel
C.
Alpha-iron, tungsten, chromium and molybdenum
D.
None of the above

Answer: Option A

Solution

Answer: Option A
Solution:
The hexagonal closest packed (hcp) has a coordination number of 12 and contains 6 atoms per unit cell. and it is found in Zinc, magnesium, cobalt, cadmium, antimony and bismuth