What is the simplest formula of a solid whose cubic unit cell has the atom A at each corner, the atom B at each face centre and a C atom at the body centre?

Explanation

To find the simplest formula of the solid with the given arrangement of atoms in the cubic unit cell, we can follow these steps:

### Step 1: Identify the positions of the atoms in the unit cell
- Atom A is located at each corner of the cubic unit cell.
- Atom B is located at the center of each face of the cubic unit cell.
- Atom C is located at the body center of the cubic unit cell.

### Step 2: Count the contribution of each type of atom
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