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Table 2.7: Atomic Packing Factor (APF)
Crystal Structure Atomic Packing Factor
Simple Cubic (SC) 52%
Body-Center Cubic (BCC) 68%
Face-Center Cubic (FCC) 74%
Hexagonal Close-Packed (HCP) 74%
Calculating the atomic packing factor for a crystal is simple: for some repeating volume,
calculate the volume of the atoms inside and divide by the total volume.
Usually, this “repeating volume” is just the volume of the unit cell. The unit cell is defined as
the simplest
Assuming all atoms have the same size, and are arranged in a repeating crystal lattice,
where N means number and V means volume.
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