(a)
Interpretation:
The number of Schottky defects per unit cell is to be determined for the given ZnS sample.
Concept introduction:
In ionic materials, most common defects found is the Schottky defect in which stoichiometric number of cations and anions are missing from the crystal lattice and the electoral neutrality of the crystal is preserved.
The relationship between the theoretical density
Here,
Volume of a unit cell
(b)
Interpretation:
The number of Schottky defects per
Concept introduction:
Number of cells per unit volume of the cell is:
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