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प्रश्न
Explain metal deficiency defect with examples.
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उत्तर
Positive metal ions are missing from their original Lattice locations in some crystals. The existence of a cation of the same metal with a higher oxidation state than the missing cation balances the extra negative charge.
For Example: In NiO one Ni2+ ion is missing, creating a vacancy at its Lattice site. The deficiency of two positive charges is made up by the presence of two Ni3+ ions at the other Lattice sites of Ni2+ ions.
Nonstoichiometric Ni0.97O1.0
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संबंधित प्रश्न
What is an impurity defect? What are its types? Explain the formation of vacancies through aliovalent impurity with example.
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(I) Frenkel defect: Electrical neutrality of the compound is preserved.
(II) Schottky defect: Density of the substance decreases.
(III) Schottky defect: Combination of vacancy defect and interstitial defect.
(IV) Frenkel defect: Small difference between size of cation and anion.
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Explain the following term:
Substitutional impurity defect
Explain the following term:
Interstitial impurity defect
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