NdNiC2 crystallizes in the orthorhombic Amm2 space group. Nd(1) is bonded in a 8-coordinate geometry to eight equivalent C(1) atoms. Ni(1) is bonded in a 4-coordinate geometry to four equivalent C(1) atoms. C(1) is bonded in a 7-coordinate geometry to four equivalent Nd(1), two equivalent Ni(1), and one C(1) atom.
NdNiC2 crystallizes in the orthorhombic Amm2 space group. Nd(1) is bonded in a 8-coordinate geometry to eight equivalent C(1) atoms. There are four shorter (2.74 Å) and four longer (2.76 Å) Nd(1)-C(1) bond lengths. Ni(1) is bonded in a 4-coordinate geometry to four equivalent C(1) atoms. There are two shorter (1.96 Å) and two longer (2.00 Å) Ni(1)-C(1) bond lengths. C(1) is bonded in a 7-coordinate geometry to four equivalent Nd(1), two equivalent Ni(1), and one C(1) atom. The C(1)-C(1) bond length is 1.36 Å.