Schottky defect is NOT observed in _____.
Q.1 (i) Schottky defect is NOT observed in _____.
A. NaCl
B. KCl
C. AgBr
D. NiO
1 answer
Best answer
Answer: D. NiO
Answer: (d) NiO
Schottky defect (equal numbers of cation and anion vacancies) occurs in ionic solids with high coordination number and ions of similar size, such as NaCl, KCl, CsCl and AgBr (AgBr shows both Schottky and Frenkel defects). NiO instead shows a non-stoichiometric metal-deficiency defect (some Ni2+ missing, balanced by Ni3+), so Schottky defect is not the defect seen in it.
Doubtly AI
· 28 Oct 2026
AI-verified · Oct 2026
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