Nd5(MnB3)2 crystallizes in the trigonal R-3m space group. There are three inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a linear geometry to two equivalent Mn(1) atoms. In the second Nd site, Nd(2) is bonded in a 6-coordinate geometry to six equivalent B(1) atoms. In the third Nd site, Nd(3) is bonded in a 6-coordinate geometry to six equivalent B(1) atoms. Mn(1) is bonded in a 7-coordinate geometry to one Nd(1) and six equivalent B(1) atoms. B(1) is bonded in a 9-coordinate geometry to two equivalent Nd(2), two equivalent Nd(3), two equivalent Mn(1), and three equivalent B(1) atoms.
Nd5(MnB3)2 crystallizes in the trigonal R-3m space group. There are three inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a linear geometry to two equivalent Mn(1) atoms. Both Nd(1)-Mn(1) bond lengths are 2.89 Å. In the second Nd site, Nd(2) is bonded in a 6-coordinate geometry to six equivalent B(1) atoms. All Nd(2)-B(1) bond lengths are 2.74 Å. In the third Nd site, Nd(3) is bonded in a 6-coordinate geometry to six equivalent B(1) atoms. All Nd(3)-B(1) bond lengths are 2.73 Å. Mn(1) is bonded in a 7-coordinate geometry to one Nd(1) and six equivalent B(1) atoms. All Mn(1)-B(1) bond lengths are 2.16 Å. B(1) is bonded in a 9-coordinate geometry to two equivalent Nd(2), two equivalent Nd(3), two equivalent Mn(1), and three equivalent B(1) atoms. There is one shorter (1.80 Å) and two longer (1.85 Å) B(1)-B(1) bond lengths.