Ce5(FeB3)2 crystallizes in the trigonal R-3m space group. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a linear geometry to two equivalent Fe(1) atoms. In the second Ce site, Ce(2) is bonded in a 6-coordinate geometry to six equivalent B(1) atoms. In the third Ce site, Ce(3) is bonded in a 6-coordinate geometry to six equivalent B(1) atoms. Fe(1) is bonded in a 7-coordinate geometry to one Ce(1) and six equivalent B(1) atoms. B(1) is bonded in a 9-coordinate geometry to two equivalent Ce(2), two equivalent Ce(3), two equivalent Fe(1), and three equivalent B(1) atoms.
Ce5(FeB3)2 crystallizes in the trigonal R-3m space group. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a linear geometry to two equivalent Fe(1) atoms. Both Ce(1)-Fe(1) bond lengths are 2.79 Å. In the second Ce site, Ce(2) is bonded in a 6-coordinate geometry to six equivalent B(1) atoms. All Ce(2)-B(1) bond lengths are 2.72 Å. In the third Ce site, Ce(3) is bonded in a 6-coordinate geometry to six equivalent B(1) atoms. All Ce(3)-B(1) bond lengths are 2.70 Å. Fe(1) is bonded in a 7-coordinate geometry to one Ce(1) and six equivalent B(1) atoms. All Fe(1)-B(1) bond lengths are 2.14 Å. B(1) is bonded in a 9-coordinate geometry to two equivalent Ce(2), two equivalent Ce(3), two equivalent Fe(1), and three equivalent B(1) atoms. There are two shorter (1.76 Å) and one longer (1.79 Å) B(1)-B(1) bond length.