Which statement is correct for Fe_3O_4? | vedclass

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(C) $Fe_3O_4$ is an inverse spinel structure.In this structure,the oxide ions $(O^{2-})$ form a cubic close-packed $(ccp)$ lattice.The total number of

Vedclass · Accepted Answer

$Fe^{3+}$ ions are present in both tetrahedral and octahedral voids in $Fe_3O_4$.

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(C) $Fe_3O_4$ is an inverse spinel structure.In this structure,the oxide ions $(O^{2-})$ form a cubic close-packed $(ccp)$ lattice.The total number of $O^{2-}$ ions per unit cell is $4$.There are $8$ tetrahedral voids and $4$ octahedral voids per unit cell.In $Fe_3O_4$,the distribution of iron ions is as follows:$1/3$ of the total iron ions are $Fe^{2+}$ and $2/3$ are $Fe^{3+}$.Specifically,$Fe^{2+}$ ions occupy $1/8$ of the tetrahedral voids,while $Fe^{3+}$ ions occupy $1/8$ of the tetrahedral voids and $1/2$ of the octahedral voids.Thus,$Fe^{3+}$ ions are present in both tetrahedral and octahedral voids.

Which statement is correct for $Fe_3O_4$?

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