For the spinel structure `(MgAl_(2)O_(4))`, the correct statement is//are

Options

A. 50% octahedral voids are occupied by ions
B. `Al^(3+)` is equally distributed in tetrahedral and octahedral voids
C. Oxide ions occupy CCP lattice
D. 12.5% tetrahedral voids are occupied by ions

Explanation

In spinel `O^(2-)` froms FCC unit cell where `Mg^(2+)` is present in tetrahedral voids and `Al^(3+)` is present in two octahedral voids. So 50% octahedral voids are occupied and 1/`8^(th)` i.e. 12.5% tetrahedral voids are occupied.