Question

calculate the number of atom in a unit cell of a metal crystallzing in fcc structure​

Answer 1

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Answer 2

Answer:

In a FCC lattice there rer 8 atoms at eight corners and 6 at face centers,

Now each corner contributes to eight cells so per unit cell contribution is 8

1×8=1 atom.

Now similarly each face center contributes to two unit cells so contribution per unit cell by six face centers is equal to 2

1 ×6=3 atoms. Hence total no. of atoms per unit cell of FCC lattice is (1+3)=4 atoms.