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Ritu from AMITY INTERNATIONAL SCHOOL, asked a question
Subject: Chemistry , asked on 29/1/13

calculate the number of atom per unit cell in end-centred and edge-centred unit cell.

EXPERT ANSWER

Kirti Gogia , Meritnation Expert added an answer, on 30/1/13
1245 helpful votes in Chemistry

The number of atoms in an end-centered unit cell are 2. This is because in each end centered unit cell, there are 8 atoms at the eight corners of the cube, and one atom each is present at the centre of any two opposite faces. 

 

Total number of atoms in one unit cell

= 8 corner atoms X (1/8) atom per unit cell + 2 face-centred atoms X (1/2) atom per unit cell

= 1 + 1

=2

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