La2Cd(SeO)2 crystallizes in the tetragonal P4_2mc space group. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 4-coordinate geometry to four equivalent Se(1), two equivalent O(1), and two equivalent O(2) atoms. In the second La site, La(1) is bonded in a 4-coordinate geometry to four equivalent Se(1), two equivalent O(1), and two equivalent O(2) atoms. In the third La site, La(2) is bonded in a 4-coordinate geometry to four equivalent Se(2), two equivalent O(1), and two equivalent O(2) atoms. In the fourth La site, La(2) is bonded in a 4-coordinate geometry to four equivalent Se(2), two equivalent O(1), and two equivalent O(2) atoms. Cd(1) is bonded to two equivalent Se(1) and two equivalent Se(2) atoms to form corner-sharing CdSe4 tetrahedra. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a 6-coordinate geometry to four equivalent La(1) and two equivalent Cd(1) atoms. In the second Se site, Se(2) is bonded in a 6-coordinate geometry to four equivalent La(2) and two equivalent Cd(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent La(1) and two equivalent La(2) atoms to form a mixture of corner and edge-sharing OLa4 tetrahedra. In the second O site, O(2) is bonded to two equivalent La(1) and two equivalent La(2) atoms to form a mixture of corner and edge-sharing OLa4 tetrahedra.
La2Cd(SeO)2 crystallizes in the tetragonal P4_2mc space group. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 4-coordinate geometry to four equivalent Se(1), two equivalent O(1), and two equivalent O(2) atoms. All La(1)-Se(1) bond lengths are 3.40 Å. Both La(1)-O(1) bond lengths are 2.38 Å. Both La(1)-O(2) bond lengths are 2.38 Å. In the second La site, La(1) is bonded in a 4-coordinate geometry to four equivalent Se(1), two equivalent O(1), and two equivalent O(2) atoms. All La(1)-Se(1) bond lengths are 3.40 Å. Both La(1)-O(1) bond lengths are 2.38 Å. Both La(1)-O(2) bond lengths are 2.38 Å. In the third La site, La(2) is bonded in a 4-coordinate geometry to four equivalent Se(2), two equivalent O(1), and two equivalent O(2) atoms. All La(2)-Se(2) bond lengths are 3.36 Å. Both La(2)-O(1) bond lengths are 2.38 Å. Both La(2)-O(2) bond lengths are 2.39 Å. In the fourth La site, La(2) is bonded in a 4-coordinate geometry to four equivalent Se(2), two equivalent O(1), and two equivalent O(2) atoms. All La(2)-Se(2) bond lengths are 3.36 Å. Both La(2)-O(1) bond lengths are 2.38 Å. Both La(2)-O(2) bond lengths are 2.39 Å. Cd(1) is bonded to two equivalent Se(1) and two equivalent Se(2) atoms to form corner-sharing CdSe4 tetrahedra. Both Cd(1)-Se(1) bond lengths are 2.70 Å. Both Cd(1)-Se(2) bond lengths are 2.70 Å. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a 6-coordinate geometry to four equivalent La(1) and two equivalent Cd(1) atoms. In the second Se site, Se(2) is bonded in a 6-coordinate geometry to four equivalent La(2) and two equivalent Cd(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent La(1) and two equivalent La(2) atoms to form a mixture of corner and edge-sharing OLa4 tetrahedra. In the second O site, O(2) is bonded to two equivalent La(1) and two equivalent La(2) atoms to form a mixture of corner and edge-sharing OLa4 tetrahedra.