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which of the following statemets is ...

which of the following statemets is not true about the hexagonal close packing ?

A

The coordination number is 12.

B

It has 74% packing efficiency .

C

Tetrahedral voids of the second layer are covered by the spheres of the third layer.

D

In this arrangement spheres of the fourth layer are exactly aligned with those of the first layer.

Text Solution

Verified by Experts

The correct Answer is:
D
In hexagonal close packing , arrangement is ABAB ….. Types and not ABC ABC ……type. Hence, (d) is not true.
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