The number of carbon atoms per unit cell of diamond unit cell is
1. 4
2. 8
3. 6
4. 1

Asked by Mamali Nanda | 13th Jul, 2016, 08:24: PM

Expert Answer:

Correct Option: 2

No.  of atoms contributed by the corner atoms to an unit cell is 1/8×8 =1

 No. of atoms contributed by the face centred atoms to the unit cell is 1/2 × 6 = 3

  And Atoms inside the structure =4

 So total number of atoms present in a diamond cubic unit cell is 1 + 3 + 4 = 8

 Since each carbon atom is surrounded by four more carbon atoms, the co-ordination number is 4

 

Answered by Vaibhav Chavan | 14th Jul, 2016, 11:34: AM