Which statement is correct for the antifluori | vedclass

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(D) In the antifluorite structure of $Na_2O$:$1$. The oxide ions $(O^{2-})$ form a cubic close-packed $(CCP)$ or face-centered cubic $(FCC)$ arrangeme

Vedclass · Accepted Answer

All of the above.

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(D) In the antifluorite structure of $Na_2O$:$1$. The oxide ions $(O^{2-})$ form a cubic close-packed $(CCP)$ or face-centered cubic $(FCC)$ arrangement.$2$. The sodium ions $(Na^{+})$ occupy all the tetrahedral voids.$3$. Since there are $8$ tetrahedral voids for every $4$ oxide ions in the $FCC$ unit cell,the ratio of $Na^{+}$ to $O^{2-}$ is $8:4$,which simplifies to $2:1$.$4$. The coordination number of $Na^{+}$ is $4$ (surrounded by $4$ $O^{2-}$ ions) and the coordination number of $O^{2-}$ is $8$ (surrounded by $8$ $Na^{+}$ ions),resulting in a $4:8$ coordination ratio.Therefore,all the given statements are correct.

Which statement is correct for the antifluorite structure of $Na_2O$?

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