1. Calculate the expected number of vacancies that will exist in a cubic inch of Aluminum at room temperature (25°C), provided that the activation energy for vacancy formation in Aluminum is equal to 0.75 eV/atom.
2. At what temperature will Aluminium have a) 1017 vacancies per cubic centimetre, b) 1020 vacancies per cubic centimetre, and c) 0 vacancies per cubic centimetre?
3. Draw a) a Frenkel Defect for an AX-type rock salt ceramic crystal and b) a Schottky Defect for an AX-type caesium chloride ceramic crystal.