The Structures of Metallic Solids

Which one of these unit cells would you expect to represent the densest packing of spheres  

T Table 12.1 summarizes how the fractional part of each atom that resides within a unit cell depends on the atom s location within the cell. 

Each structure can be generated by the combination of a single-atom motif and the appropriate lattice. 

TABLE 12.1 hraction ot Any Atom as a Function ot Location Within the Unit Cell  

A FIGURE 12,12 A space-filling view of unit cells for metals with a cubic structure. Only the portion of each atom that falls within the unit cell Is shown. 

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