Barium titanate has the pervoskite structure, i.e. a cubinc lattice with `Ba^(2+)` ions at the corners of the unit cell, oxide ions at the face centres and titanium ions at the body centred. The molecular formula of barium titante is

Options

A. `BaTiO_(3)`
B. `BaTiO_(4)`
C. `BaTiO_(2)`
D. `BaTiO`

Answer

A

Explanation

No. of `Ba^(2+)` ions at the corner 8 `=8xx(1)/(8)=1`
No of `O^(2-)` ions at the face centres `=6xx(1)/(2)=3` No. of `Ti^(4+)` ions at body centre
`:.` Ratio `Ba^(2+):Ti^(4):O^(-2)=1:1:3`
`:.` Molecular formula is Ba Ti `O_(3)`