Figure 3.6 illustrates the definition of the angles and unit cell dimensions of the crystalline material. If a unit cell has a characteristic of a ¼ b ¼ c and α ¼ β ¼ γ ¼ 90^o, it forms a cubic crystal system, which is the case of Si and GaAs.

Figure 3.6

(a) How many Bravais lattices are classified in the cubic system?

(b) Draw simple three-dimensional unit cells for each Bravais lattice in the cubic system.

(c) How many lattice points are contained in the unit cell for each Bravais lattice in the cubic system?