Sodium oxide (Na₂O) crystallizes in a structure in which the O^2- ions are in a face-centered cubic lattice and the Na⁺ ions are in tetrahedral holes. What is the number of Na⁺ ions in the unit cell? A) 8 B) 2 C) 4 D) 6 E) none of these

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In a face-centered cubic lattice, there are 4 O^2- ions per unit cell. Each O^2- ion can accommodate 2 Na⁺ ions in tetrahedral holes, resulting in 8 Na⁺ ions per unit cell.

Sodium Oxide (Na2O) Crystallizes in a Structure in Which the O2-

Sodium Oxide (Na₂O) Crystallizes in a Structure in Which the O^2-