Question: The unit cell for Al2O3 has hexagonal symmetry with lattice parameters a = 0.4759 nm and c =1.2989 nm. If the density of this material

The unit cell for Al2O3 has hexagonal symmetry with lattice parameters a = 0.4759 nm and c =1.2989 nm. If the density of this material is 3.99 g/cm3, calculate its atomic packing factor. For this computation use ionic radii listed in Table 12.3?

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