“…Dy, Ho, Er, Tm, Lu [8,9] and Sc [10] while the larger rare earths La-Nd, Sm, Gd, Tb, Y form the structure of the Nd 11 Pd 4 In 9 type [18]. The variation of the parameter (V/N) (where V is the volume of the unit cell, N -the number of atoms per unit cell) for RE 11 Ni 4 In 9 and RE 5 Ni 2 In 4 [4,9] compounds as a size function of the effective ionic radii of the rareearths (R 3þ , coordination number VI) [24] is shown in Fig.…”