Ce3Ni2Sn7 crystallizes in the orthorhombic Cmmm space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to two equivalent Ni(1), four equivalent Sn(1), four equivalent Sn(2), and four equivalent Sn(3) atoms to form a mixture of distorted corner and face-sharing CeNi2Sn12 cuboctahedra. In the second Ce site, Ce(2) is bonded in a 14-coordinate geometry to four equivalent Ni(1), two equivalent Sn(2), two equivalent Sn(3), and six equivalent Sn(4) atoms. Ni(1) is bonded in a 5-coordinate geometry to one Ce(1), four equivalent Ce(2), one Sn(4), two equivalent Sn(2), and two equivalent Sn(3) atoms. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a distorted square co-planar geometry to four equivalent Ce(1) atoms. In the second Sn site, Sn(2) is bonded in a 6-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), and two equivalent Ni(1) atoms. In the third Sn site, Sn(3) is bonded in a 6-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), and two equivalent Ni(1) atoms. In the fourth Sn site, Sn(4) is bonded in a 9-coordinate geometry to six equivalent Ce(2), one Ni(1), and two equivalent Sn(4) atoms.
Ce3Ni2Sn7 crystallizes in the orthorhombic Cmmm space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to two equivalent Ni(1), four equivalent Sn(1), four equivalent Sn(2), and four equivalent Sn(3) atoms to form a mixture of distorted corner and face-sharing CeNi2Sn12 cuboctahedra. Both Ce(1)-Ni(1) bond lengths are 3.48 Å. All Ce(1)-Sn(1) bond lengths are 3.24 Å. All Ce(1)-Sn(2) bond lengths are 3.33 Å. All Ce(1)-Sn(3) bond lengths are 3.33 Å. In the second Ce site, Ce(2) is bonded in a 14-coordinate geometry to four equivalent Ni(1), two equivalent Sn(2), two equivalent Sn(3), and six equivalent Sn(4) atoms. All Ce(2)-Ni(1) bond lengths are 3.60 Å. Both Ce(2)-Sn(2) bond lengths are 3.49 Å. Both Ce(2)-Sn(3) bond lengths are 3.49 Å. There are four shorter (3.37 Å) and two longer (3.51 Å) Ce(2)-Sn(4) bond lengths. Ni(1) is bonded in a 5-coordinate geometry to one Ce(1), four equivalent Ce(2), one Sn(4), two equivalent Sn(2), and two equivalent Sn(3) atoms. The Ni(1)-Sn(4) bond length is 2.49 Å. Both Ni(1)-Sn(2) bond lengths are 2.53 Å. Both Ni(1)-Sn(3) bond lengths are 2.52 Å. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a distorted square co-planar geometry to four equivalent Ce(1) atoms. In the second Sn site, Sn(2) is bonded in a 6-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), and two equivalent Ni(1) atoms. In the third Sn site, Sn(3) is bonded in a 6-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), and two equivalent Ni(1) atoms. In the fourth Sn site, Sn(4) is bonded in a 9-coordinate geometry to six equivalent Ce(2), one Ni(1), and two equivalent Sn(4) atoms. Both Sn(4)-Sn(4) bond lengths are 2.88 Å.