What are the coordination numbers of calcium and titanium,respectively,in perovskite? The unit cell is shown below. 
Definitions:
Oxygen
A chemical element with symbol O, essential for respiration in many organisms and known for its high electronegativity and ability to form oxides.
Bond Angle
The angle formed between two bonds that originate from the same atom, crucial for determining the shape and geometry of molecules.
Three-Dimensional Model
A representation of an object or system in three dimensions, providing a realistic view of its structure and arrangement.
Methanol
A simple alcohol with the formula CH3OH, used as a solvent, antifreeze, fuel, and in the manufacture of formaldehyde.
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