Two patterns of packing different types of spheres are shown here. For each structure (a) Draw the

Question:

Two patterns of packing different types of spheres are shown here. For each structure
(a) Draw the two-dimensional unit cell,
(b) Determine the angle between the lattice vectors, g, and whether the lattice vectors are the same length or of different lengths,
(c) Determine the type of two-dimensional lattice (from Figure 12.4)?