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The total number of atoms per unit cell ...

The total number of atoms per unit cell of a face centred cubic crystal is

A

1

B

2

C

3

D

4

Text Solution

Verified by Experts

A face centred cubic unit cell contains atoms at all the corners and at the centre of all the faces of the cube .
` :. ` Contributions by atoms on the corners =` 1/8 xx 8 = 1 `
Contributaion by atoms on the face centred = `1/2 xx 8 xx =1 `
` :. ` Total number of atoms present per unit cell of a face cetred cubic crystal is `1+3 = 4`
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