In fig. 48 the periodic table is shown with the tagged d- and f-band metals. For calculating the
band structure of these metals with the tight binding model only the d- and f-band electrons are
interesting, because these are the only electrons which interact with electrons of their neighbor atoms.
The resulting band then is called d respectively f, hence also the metals are called d- and f-band
metals.
Figure 48: Periodic table.