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A metallic crystal cystallizes into a la...

A metallic crystal cystallizes into a lattice containing a sequence of layers `ABABAB…`. Any packing of spheres leaves out voids in the lattice. What percentage by volume of this lattice is empty spece?

A

74

B

26

C

20

D

16

Text Solution

Verified by Experts

The correct Answer is:
B
ABAB.... is hexagonal close packing (hcp) in which space occupied = 74% and empty space = 26% .
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