Ce2Cd(SeO)2 crystallizes in the tetragonal P4_2/nmc space group. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 4-coordinate geometry to four equivalent Se(1) and four equivalent O(1) atoms. In the second Ce site, Ce(1) is bonded in a 4-coordinate geometry to four equivalent Se(1) and four equivalent O(1) atoms. In the third Ce site, Ce(1) is bonded in a 4-coordinate geometry to four equivalent Se(1) and four equivalent O(1) atoms. Cd(1) is bonded to four equivalent Se(1) atoms to form distorted corner-sharing CdSe4 tetrahedra. Se(1) is bonded in a 6-coordinate geometry to four equivalent Ce(1) and two equivalent Cd(1) atoms. O(1) is bonded to four Ce(1,1) atoms to form a mixture of corner and edge-sharing OCe4 tetrahedra.
Ce2Cd(SeO)2 crystallizes in the tetragonal P4_2/nmc space group. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 4-coordinate geometry to four equivalent Se(1) and four equivalent O(1) atoms. All Ce(1)-Se(1) bond lengths are 3.27 Å. There are two shorter (2.34 Å) and two longer (2.35 Å) Ce(1)-O(1) bond lengths. In the second Ce site, Ce(1) is bonded in a 4-coordinate geometry to four equivalent Se(1) and four equivalent O(1) atoms. All Ce(1)-Se(1) bond lengths are 3.27 Å. There are two shorter (2.34 Å) and two longer (2.35 Å) Ce(1)-O(1) bond lengths. In the third Ce site, Ce(1) is bonded in a 4-coordinate geometry to four equivalent Se(1) and four equivalent O(1) atoms. All Ce(1)-Se(1) bond lengths are 3.27 Å. There are two shorter (2.34 Å) and two longer (2.35 Å) Ce(1)-O(1) bond lengths. Cd(1) is bonded to four equivalent Se(1) atoms to form distorted corner-sharing CdSe4 tetrahedra. All Cd(1)-Se(1) bond lengths are 2.71 Å. Se(1) is bonded in a 6-coordinate geometry to four equivalent Ce(1) and two equivalent Cd(1) atoms. O(1) is bonded to four Ce(1,1) atoms to form a mixture of corner and edge-sharing OCe4 tetrahedra.