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Assignments
 Explain the terms: Primitive cell and unit cell
 What do you mean by space lattice and what is its characteristic feature?
 Calculate the number of atoms per unit cell of a metal having a lattice parameter 0.29nm and density of 7870Kg/m^{3}. Atomic weight of the metal is 55.85.
 What do you mean by packing fraction? Calculate the same for Simple Cube, Body Centered and Face Centered
 Why an equilateral triangle canÃƒÂ¢Ã¢â€šÂ¬Ã¢â€žÂ¢t be used as the basis of lattice?
 Is fivefold axis of rotation is compatible in a lattice. If not why?
 What is the packing fraction for a hexagonal and diamond structure?
 Construct a two dimensional pentagonal and octagonal lattice. Explain how?
 What do you mean by coordination number and what is its value for the three lattices of cubic system?

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