A) A cation occupies one-eighth of the tetrahedral holes and B cation occupies half of octahedral holes
B) A cation occupies one-fourth of the tetrahedral holes and the B cations the octahedral holes
C) A cation occupies one-eighth of the octahedral hole and the B cation the tetrahedral holes
D) A cation occupies one-fourth of the octahedral holes and the B cations the tetrahedral holes
Correct Answer: A
Solution :
[a] fcc array\[\Rightarrow \]no. of \[{{O}^{2-}}\]ions=4 no. of TVs=8 and OVs=4 \[A\to \frac{1}{8}\times 8=1,B\to 4\times \frac{1}{2}=2\] and \[{{O}^{2-}}=4\]so formula of spinel \[=A{{B}_{2}}{{O}_{4}}\]You need to login to perform this action.
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