Further, the first B-Z for a bcc crystal lattice has the rhombic dodecahedron
shape (Fig. 2.31a). It has twelve identical faces located at the distance
ffiffi ffi
2
p p
a
À Á
from
the center of the zone, where a is the periodicity of the lattice.
The shortest distance of zone face from the center of the zone is:
Fig. 2.30 FS partially on first and second BZ
Fig. 2.31 BZ and FS of a bcc b fcc lattice
84
2 Unit Cell Construction
shape (Fig. 2.31a). It has twelve identical faces located at the distance
ffiffi ffi
2
p p
a
À Á
from
the center of the zone, where a is the periodicity of the lattice.
The shortest distance of zone face from the center of the zone is:
Fig. 2.30 FS partially on first and second BZ
Fig. 2.31 BZ and FS of a bcc b fcc lattice
84
2 Unit Cell Construction