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Crystal Lattice and Unit Cell

Perovskite a ...

Question

Perovskite a mineral containing calcium, oxygen and titanium. crystallises in the unit cell as shown below.
On the basis of above information write the formula of perocskite?

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Solution

A unit cell is the most basic and least volume consuming repeating structure of any solid.
The chemical formula of a perovskite structure is $A B O_{3}$ . So the formula of given structure is $T : C O_{3}$

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