Question

1.
A face centred cube (fcc) consists of how many
atoms? Explain.
(July 16]
OR
Calculate the number of atoms in a unit cell of a
metal crystallising in face centred cubic
structure.
July 171
1.6
P​

Answer 1

Explanation:

An FCC unit cell contains four atoms: one-eighth of an atom at each of the eight corners (8X18 = 18 X 18 = 1 atom from the corners) and one-half of an atom on each of the six faces (6 x 12 = 36 x 12 = 3 atoms from the faces).