Question

What type of crystal defect is indicated in the diagram below?

$N{a}^{+}$	$C{l}^{-}$	$N{a}^{+}$	$C{l}^{-}$	$N{a}^{+}$	$C{l}^{-}$
$C{l}^{-}$		$C{l}^{-}$	$N{a}^{+}$		$N{a}^{+}$
$N{a}^{+}$	$C{l}^{-}$		$C{l}^{-}$	$N{a}^{+}$	$C{l}^{-}$
$C{l}^{-}$	$N{a}^{+}$	$C{l}^{-}$	$N{a}^{+}$		$N{a}^{+}$

• A. Frenkel defect
• B. Schottky defect
• C. Interstitial defect
• D. Frenkel and Schottky defects

Answer 1

The correct option is B Schottky defect

Schottky defect is indicated in the diagram as equal number of sodium cation and chloride anion are missing.
In Frenkel defect, a cation or anion leaves its regular site and occupies interstitial position.