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. $3A^{2+}$ are replaced by $2A^{3+}$, thus one vacant site per pair of $A^{3+}$ is created