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In A_xB_y crystal structure, A atoms occupied all octahedral as well as all tetrahedral voids and B atoms are at FCC centres. What is the formula of compound A_xB_y,

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AB₃

A₁₀B₃

A₁₅B₃₆

A₃B

answer is D.

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Detailed Solution

B=4 because B atoms are at FCC centres. A atoms occupied all octahedral as well as all tetrahedral voids, this means 12 (8 for tetrahedral and 4 for octahedral).

$A_{12} B_{3} = A_{3} B$

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