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  • Need explanation for: An atom Xcrystallises as end centred unit cell then the number of atoms per unit cell is -

An atom X crystallises as end centred unit cell then the number of atoms per unit cell is -

  • Option 1)

    2

  • Option 2)

    3

  • Option 3)

    4

  • Option 4)

    8

 

Answers (1)

In end centred unit cell atoms are present at each corner and any two opposite face centre.

Number of atoms per unit cell = 8\times \frac{1}{8}+2\times \frac{1}{2}=2

 

No. of atoms(z) for end centered unit cell -

Lattice point: at corners and one pair of opposite face centers.

For  end centered cubic, z=2

- wherein

 

 


Option 1)

2

This is correct

Option 2)

3

This is incorrect

Option 3)

4

This is incorrect

Option 4)

8

This is incorrect

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subam

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