Closed Packed Structures of Metals

For both hep and the cep structures, the number of the next neighbors is 12, but the number of second and third next neighbors is different. The numbers are given in Table 2.1. 

The structures obtained by closed packing of atoms in metals given in the literature are equihbrium structures. The arrangement of layers is a long-range order and is, especially 

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Another well known layered defect is the so-called stacking fault, often forming in close-packed structures of metals. This is because ccp and hep have a very small energy difference. They can intergrow along the [111] axis (ABCABC stacking) of... 

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