Question

How many atoms are there in end - centred cubic unit cell

Answer 1

Dear student, in end - centre cubic unit cell have lattice points at corners and only two opposite faces. Also we know that lattice points at corners each contribute 1/8 and there are 8 corners. And atom at faces contribute 1/2 and there are two atoms on opposite faces . Number of atoms in an end centred cubic unit cell= 8×1/8 + 2 x ½ = 2 regards.