What is the formula for packing efficiency?
- A$\frac{\text{Volume of unit cell}}{\text{Volume of atoms in unit cell}} \times 100$
- B$\frac{\text{Volume of atoms in unit cell}}{\text{Volume of unit cell}} \times 100$
- C$\frac{\text{Volume of unit cell}}{\text{Volume of atoms in unit cell}}$
- D$\frac{\text{Volume of atoms in unit cell}}{\text{Volume of unit cell}}$
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