An example of metal deficiency defect

Give an example for metal deficiency defect of cation vacancy.

Write short note on metal excess and metal deficiency defect with an example .

What are metal deficiency defects ?

(i) Calculate the number of atoms per unit cell of bcc type. (ii) Write short note on metal excess and metal deficiency defect with an example.

Which of the following set of compounds will show metal deficiency defect?