The figure below shows a unit cell of the mineral Perovskite ( the titanium atom is at the centre of the cube ). Which of the following is a correct chemical formula for this mineral ?

Options

A. `Ca_(8)TiO_(6)`
B. `CaTiO`
C. `Ca_(2)TiO_(3)`
D. `CaTiO_(3)`

Answer

4

Explanation

`Z_(Ca)=,8xx(1)/(8)=1,Z_(r)=1xx1=1.Z_(o)=6xx(1)/(2)=3`
`:'O^(2-)` ions are at 6 face centres and `Ca^(2+)` at 8 comers.