Question

Metal M ions form accp structure. Oxide ions occupy `1/2` octahedral and `1/2` tetrahedral voids. What is the formula of the oxide?

Options

• MO

• MO₂

• MO₃

• M₂O₃

Answer 1

M₂O₃ 

Explanation:

Metal M ions form ccp structure.

Let number of ions of M be: X

No. of tetrahedral voids = 2x

No. of octahedral voids = x

Number of oxide ions will be 1/2 x + 1/2 (2x) = 3/2 x

Formula of oxide = MxO3/2 x = M₂O₃