Question

Which of the following represents the lattice structure of $A _{0.95} O$ containing $A ^{2+}, A ^{3+}$ and $O ^{2-}$ ions?

• A. A and B only
• B. B and C only
• C. A only
• D. B only

Answer 1

Answer: (C)

Applying electrical neutrality principle in metal defficiency defect. $3 A ^{2+}$ are replaced by $2 A ^{3+}$, thus one vacant site per pair of $A ^{3+}$ is created