AIPMT MAINS 2012 Chemistry Crystal Structures MCQ Question
Structure of a mixed oxide is cubic close-packed (c.c.p). The cubic unit cell of mixed oxide is composed of oxide ions. One fourth of the tetrahedral voids are occupied by divalent metal A and the octahedral voids are occupied by a monovalent metal B. The formula of the oxide is:
ABO₂
A₂BO₂
A₂B₃O₄
AB₂O₂
Correct Answer
Detailed Explanation
In a cubic close-packed structure, the number of tetrahedral voids is twice the number of atoms, and the number of octahedral voids is equal to the number of atoms. Given the occupancy, the formula is AB₂O₂.
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