Question:
Explain Schottky defect with the help of a diagram.
Explain Schottky defect with the help of a diagram.
Show Hint
Remember: Schottky defect reduces density, whereas Frenkel defect does not.
Updated On: Oct 7, 2025
Hide Solution
Verified By Collegedunia
Solution and Explanation
Step 1: Understanding the Schottky defect.
A Schottky defect occurs when equal numbers of cations and anions are missing from their lattice sites in an ionic crystal.
Step 2: Properties of Schottky defect.
\begin{enumerate} \item It decreases the density of the crystal because some ions are missing. \item It usually occurs in highly ionic compounds with high coordination numbers, such as NaCl, KCl, and CsCl. \item Electrical neutrality is maintained because the number of missing cations equals the number of missing anions. \end{enumerate} Step 3: Diagram representation.
\[ \begin{array}{|c|c|c|c|} \hline + & - & + & -
\hline - & \square & - & +
\hline + & - & \square & -
\hline - & + & - & +
\hline \end{array} \] Here, $\square$ indicates missing ions representing Schottky defects.
Conclusion:
A Schottky defect is a type of vacancy defect in ionic crystals where equal numbers of cations and anions are missing, leading to a decrease in density.
A Schottky defect occurs when equal numbers of cations and anions are missing from their lattice sites in an ionic crystal.
Step 2: Properties of Schottky defect.
\begin{enumerate} \item It decreases the density of the crystal because some ions are missing. \item It usually occurs in highly ionic compounds with high coordination numbers, such as NaCl, KCl, and CsCl. \item Electrical neutrality is maintained because the number of missing cations equals the number of missing anions. \end{enumerate} Step 3: Diagram representation.
\[ \begin{array}{|c|c|c|c|} \hline + & - & + & -
\hline - & \square & - & +
\hline + & - & \square & -
\hline - & + & - & +
\hline \end{array} \] Here, $\square$ indicates missing ions representing Schottky defects.
Conclusion:
A Schottky defect is a type of vacancy defect in ionic crystals where equal numbers of cations and anions are missing, leading to a decrease in density.
Was this answer helpful?
0
0
Top Questions on Solid State
- Define : Ferromagnetism
- Define : Schottky defect
- Define : Unit Cell
- Define : Isomorphism
- Copper has fcc structure with edge length 495 pm. What is the radius of copper atom in pm?
View More Questions
Questions Asked in UP Board XII exam
- Find the unit vector perpendicular to each of the vectors (\( \vec{a} + \vec{b} \)) and (\( \vec{a} - \vec{b} \)) where \[\vec{a} = \hat{i} + \hat{j} + \hat{k}, \, \vec{b} = \hat{i} + 2\hat{j} + 3\hat{k}.\]
- Show that the function \( f(x) = 7x^2 - 3 \) is an increasing function when \( x>0 \).
- UP Board XII - 2026
- Application of derivatives
- The radius of an air bubble is increasing at the rate of \(\frac{1}{2} \, \text{cm/s}\). At what rate is the volume of the bubble increasing while the radius is 1 cm?
- UP Board XII - 2026
- Application of derivatives
- If three vectors \(\vec{a}\), \(\vec{b}\) and \(\vec{c}\) satisfying the condition \(\vec{a} + \vec{b} + \vec{c} = 0\). If \(|\vec{a}| = 3\), \[|\vec{b}| = 4 \text{ and } |\vec{c}| = 2, \text{ then find the value of } \vec{a} \cdot \vec{b} + \vec{b} \cdot \vec{c} + \vec{c} \cdot \vec{a}.\] 5
- Prove that (4, 4, 2), (3, 5, 2) and (-1, -1, 2) are vertices of a right angle triangle.
View More Questions