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Question

In a compound, O2 ions are arranged in ccp. One-sixth of tetrahedral voids are occupied by cations A while one-third of octahedral voids are occupied by cation B. The formula of the compound is ABO3.
If true enter 1, else enter 0.

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Solution

Number of O2 ions (ccp or fcc type) =4 per unit cell
Number of cation A =16× tetrahedral voids =16×8=43 per unit cell
16×TV=16×8=43 per unit cell
Number of cation B= 13×OV=13×4=43 unit cell
13×OV=13×4=43 per unit cell
Formula: A43B43O4ABO3

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