Empty lattice approximation for an fcc crystal
Γ
X
L
U
K
W
Γ
X
L
U
K
W
Γ
X
L
U
K
W
Γ
X
L
U
K
W
Γ
X
L
U
K
W
Γ
X
L
U
K
W
Γ
X
L
U
K
W