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Barium titanate crystallizes in perovski...

Barium titanate crystallizes in perovskite structure `(ABO_(3))` which is a cubic lattice with barium ions occupying the corners of the unit cell ,oxide ions occupying the face centres and titanium ion occupying centes of unit cell.if `Ti^(4+)` ions are described as occupying the holes in `Ba-O` lattice. then type of hole and fraction of these holes occupied by these ions are

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