Fig. 20: Model state densities (d-bands only) for a RFe2 compound in the paramagnetic state. The situation in the RFe4Al8 compounds is certainly similar to this. On the left the separated metals are shown. In the centre the unhybridised (ionic) density of states in which there is no 5d density associated with the R atom. On the right is the model density for hybridised bands. When the 3d moments are polarised the bands are split, and it is the small grey part on the left of this figure that corresponds to the 5d states observed in the X-ray experiment.