Question

Explain the structure of $BiTiO_{3}$.

Answer 1

I think you mean the structure of BaTiO3 , also known as Perovoskii structure .

Here the Oxide Ions Occupy Face Centre and therefore is 3 in number(0.5*6)

Ba2+ ions occupy the corners(8/8)

and Ti(1) is present at the centre of unitcell