Question

Element 'B' forms ccp structures and A occupies half of the octahedral voids, while oxygen atoms occupy all the tetrahedral voids. The structure of bimetallic oxide is ______.

Options

• A₂BO₄

• AB₂O₄

• A₂B₂O

• A₄B₂O

Answer 1

Element 'B' forms ccp structures and A occupies half of the octahedral voids, while oxygen atoms occupy all the tetrahedral voids. The structure of bimetallic oxide is AB₂O₄.

Explanation:

No. of lattice points = No. of O₂ voids

∴ No. of atoms of B = 4

No. of atoms of A = `1/2 xx` No. of O₂ voids

`= 1/2 xx 4`

= 2

No. of 'O' atoms = No. of all T_d voids = 8

= A : B : O = 2 : 4 : 8 = 1 : 2 : 4

The formula of the compound is AB₂O₄.