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Table 1 The values of the atomic packing factor ( η) for different crystal structures

From: The effects of the size of nanocrystalline materials on their thermodynamic and mechanical properties

No. Crystal structure η(%)
1 Body-centered cubic (bcc) 0.68
2 Face-centered cubic (fcc) 0.74
3 Close-packed hexagonal (hcp) 0.74
4 Diamond structure (bct) 0.74