Ce2Sn5 crystallizes in the monoclinic P2/m space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to two equivalent Sn(1), two equivalent Sn(2), two equivalent Sn(3), two equivalent Sn(4), and four equivalent Sn(5) atoms to form a mixture of corner and face-sharing CeSn12 cuboctahedra. In the second Ce site, Ce(2) is bonded in a 10-coordinate geometry to two equivalent Sn(3), two equivalent Sn(4), and six equivalent Sn(6) atoms. There are six 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 distorted square co-planar geometry to four equivalent Ce(1) atoms. In the third Sn site, Sn(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Ce(1), two equivalent Ce(2), and four equivalent Sn(4) atoms. In the fourth Sn site, Sn(4) is bonded in a 10-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), two equivalent Sn(5), and four equivalent Sn(3) atoms. In the fifth Sn site, Sn(5) is bonded in a distorted square co-planar geometry to four equivalent Ce(1) and two equivalent Sn(4) atoms. In the sixth Sn site, Sn(6) is bonded in a 8-coordinate geometry to six equivalent Ce(2) and two equivalent Sn(6) atoms.
Ce2Sn5 crystallizes in the monoclinic P2/m space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to two equivalent Sn(1), two equivalent Sn(2), two equivalent Sn(3), two equivalent Sn(4), and four equivalent Sn(5) atoms to form a mixture of corner and face-sharing CeSn12 cuboctahedra. Both Ce(1)-Sn(1) bond lengths are 3.33 Å. Both Ce(1)-Sn(2) bond lengths are 3.36 Å. Both Ce(1)-Sn(3) bond lengths are 3.34 Å. Both Ce(1)-Sn(4) bond lengths are 3.39 Å. All Ce(1)-Sn(5) bond lengths are 3.28 Å. In the second Ce site, Ce(2) is bonded in a 10-coordinate geometry to two equivalent Sn(3), two equivalent Sn(4), and six equivalent Sn(6) atoms. There is one shorter (3.27 Å) and one longer (3.28 Å) Ce(2)-Sn(3) bond length. Both Ce(2)-Sn(4) bond lengths are 3.29 Å. There are four shorter (3.36 Å) and two longer (3.58 Å) Ce(2)-Sn(6) bond lengths. There are six 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 distorted square co-planar geometry to four equivalent Ce(1) atoms. In the third Sn site, Sn(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Ce(1), two equivalent Ce(2), and four equivalent Sn(4) atoms. All Sn(3)-Sn(4) bond lengths are 3.28 Å. In the fourth Sn site, Sn(4) is bonded in a 10-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), two equivalent Sn(5), and four equivalent Sn(3) atoms. There is one shorter (3.28 Å) and one longer (3.29 Å) Sn(4)-Sn(5) bond length. In the fifth Sn site, Sn(5) is bonded in a distorted square co-planar geometry to four equivalent Ce(1) and two equivalent Sn(4) atoms. In the sixth Sn site, Sn(6) is bonded in a 8-coordinate geometry to six equivalent Ce(2) and two equivalent Sn(6) atoms. There is one shorter (3.03 Å) and one longer (3.04 Å) Sn(6)-Sn(6) bond length.