Question

the number of carbon atoms per unit cell of diamond unit cell is a)1
b)4
c)8
d)6

Answer 1

Answer:

The number of carbon atoms per unit cell of diamond unit cell is 8

Answer 2

Answer:

8

Explanation:

diamond has FCC lattice with carbon on the lattice points and carbons on alternate tetrahedral voids

8(1/8) for corner

6(1/2) for face centers

that makes 4

now total number of tetrahedral voids is 2N where N is no. of atoms on the latice points in a unit cell

so here it's 2(4) = 8

but in diamond carbons occupy alternate tetrahedral voids so carbons on voids are 4

4 on the lattice points on FCC

4 on the voids

that results 8

hope it helps u

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