Question

what is total number of atoms per unit cell in a face centered cubic (fec) structure ​

Answer 1

6 atoms are present at 6 corners of a fcc unit cell. Each atom contributes one half to the unit cell. Total contribution =6×21=3. Total number of atoms in one fcc unit cell =1+3=4.

Answer 2

Answer:

Coordination Number and Number of Atoms Per Unit Cell

Coordination Number and Number of Atoms Per Unit CellAll crystal lattices are built of repeating unit cells. ... The hexagonal closest packed (hcp) has a coordination number of 12 and contains 6 atoms per unit cell. The face-centered cubic (fcc) has a coordination number of 12 and contains 4 atoms per unit cell.

Explanation:

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