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

Number of `Ba^(2+)` ions at the corner of unit cell
`= 8 xx 1/8 = 1`
Number of `O^(2-)` ions at the face centre
`= 6 xx 1/2 = 3`
Number of `Ti^(4+) ` ions at the body centre = 1
`therefore` Molecular formula of barium titanate
`= BaTiO_3`