Exercises 2.2: Crystal lattice vs. crystal structure

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2.2.1 The figure shows a structure based on a lattice with a1 = 3 A, a2 = 6 A, and phi = 60.

A) What is the basis for this structure?

B) Define the same structure using a primitive indexing.

C) Can the structure be defined using a rectangular cell? If so, what is the cell and a basis?

D) Can it be defined with a primitive rectangular cell? If so, what is that cell?