Nd3CeC8 crystallizes in the tetragonal P4/mmm space group. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a distorted q4 geometry to one C(2), one C(4), four equivalent C(1), and four equivalent C(3) atoms. In the second Nd site, Nd(2) is bonded in a distorted q4 geometry to two equivalent C(3) and eight equivalent C(2) atoms. Ce(1) is bonded in a distorted q4 geometry to two equivalent C(1) and eight equivalent C(4) atoms. There are four inequivalent C sites. In the first C site, C(1) is bonded in a 6-coordinate geometry to four equivalent Nd(1), one Ce(1), and one C(3) atom. In the second C site, C(2) is bonded in a 6-coordinate geometry to one Nd(1), four equivalent Nd(2), and one C(2) atom. In the third C site, C(3) is bonded in a 6-coordinate geometry to one Nd(2), four equivalent Nd(1), and one C(1) atom. In the fourth C site, C(4) is bonded in a 6-coordinate geometry to one Nd(1), four equivalent Ce(1), and one C(4) atom.
Nd3CeC8 crystallizes in the tetragonal P4/mmm space group. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a distorted q4 geometry to one C(2), one C(4), four equivalent C(1), and four equivalent C(3) atoms. The Nd(1)-C(2) bond length is 2.59 Å. The Nd(1)-C(4) bond length is 2.55 Å. All Nd(1)-C(1) bond lengths are 2.79 Å. All Nd(1)-C(3) bond lengths are 2.80 Å. In the second Nd site, Nd(2) is bonded in a distorted q4 geometry to two equivalent C(3) and eight equivalent C(2) atoms. Both Nd(2)-C(3) bond lengths are 2.57 Å. All Nd(2)-C(2) bond lengths are 2.80 Å. Ce(1) is bonded in a distorted q4 geometry to two equivalent C(1) and eight equivalent C(4) atoms. Both Ce(1)-C(1) bond lengths are 2.56 Å. All Ce(1)-C(4) bond lengths are 2.80 Å. There are four inequivalent C sites. In the first C site, C(1) is bonded in a 6-coordinate geometry to four equivalent Nd(1), one Ce(1), and one C(3) atom. The C(1)-C(3) bond length is 1.30 Å. In the second C site, C(2) is bonded in a 6-coordinate geometry to one Nd(1), four equivalent Nd(2), and one C(2) atom. The C(2)-C(2) bond length is 1.29 Å. In the third C site, C(3) is bonded in a 6-coordinate geometry to one Nd(2), four equivalent Nd(1), and one C(1) atom. In the fourth C site, C(4) is bonded in a 6-coordinate geometry to one Nd(1), four equivalent Ce(1), and one C(4) atom. The C(4)-C(4) bond length is 1.30 Å.