Which of the following structures is not correctly matched ?

Options

A. NaCl type - `Cl^-` ions in ccp structure. `Na^+` ions in half octahedral holes
B. ZnS type - `S^(2-)` ions in ccp structure . `Zn^(2+)` ions in alternate tetrahedral voids .
C. `CaF_2` type - `Ca^(2+)` ions in ccp structure `F^-` ions in all tetrahedral voids
D. `Na_2O` type - `O^(2-)` ions in ccp structure. `Na^(+)` ions in all tetrahedral holes .

Answer

A

Explanation

In NaCl type, `Cl^-` ions form ccp structures while `Na^+` ions are present in all octahedral voids .