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When NaCl crystal is doped with MgCl(2),...

When NaCl crystal is doped with `MgCl_(2)`,the nature of defect produced is

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It is called impurity defect. A cation vacancy is produced . A substitutional solid solution is formed (because 2 `Na^+` ions are replaced by one `Sr^(2+)` ion in the lattice site. )
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