“…The RCo 4 B phases, belonging to the R n+1 Co 3n+5 B 2n (n ¼ 0, 1, 2, 3, N) family of compounds with n ¼ 1, crystallize in the hexagonal (P6/mmm) CeCo 4 B-type structure which is obtained by an ordered substitution of boron for cobalt in every second layer of the CaCu 5 -type structure. In the CeCo 4 B-type structure, the R atoms occupy the 1a and 1b sites, the Co atoms are in the 2c and 6i sites, and the B atoms reside in the 2d sites [12,13]. As can be seen in Fig.…”