Lu2SeO2 crystallizes in the trigonal P-3m1 space group. Lu(1) is bonded in a 7-coordinate geometry to three equivalent Se(1) and four equivalent O(1) atoms. Se(1) is bonded to six equivalent Lu(1) atoms to form SeLu6 octahedra that share corners with twelve equivalent O(1)Lu4 tetrahedra, edges with six equivalent Se(1)Lu6 octahedra, and edges with six equivalent O(1)Lu4 tetrahedra. O(1) is bonded to four equivalent Lu(1) atoms to form OLu4 tetrahedra that share corners with six equivalent Se(1)Lu6 octahedra, corners with six equivalent O(1)Lu4 tetrahedra, edges with three equivalent Se(1)Lu6 octahedra, and edges with three equivalent O(1)Lu4 tetrahedra. The corner-sharing octahedral tilt angles range from 28-48°.
Lu2SeO2 crystallizes in the trigonal P-3m1 space group. Lu(1) is bonded in a 7-coordinate geometry to three equivalent Se(1) and four equivalent O(1) atoms. All Lu(1)-Se(1) bond lengths are 2.90 Å. All Lu(1)-O(1) bond lengths are 2.21 Å. Se(1) is bonded to six equivalent Lu(1) atoms to form SeLu6 octahedra that share corners with twelve equivalent O(1)Lu4 tetrahedra, edges with six equivalent Se(1)Lu6 octahedra, and edges with six equivalent O(1)Lu4 tetrahedra. O(1) is bonded to four equivalent Lu(1) atoms to form OLu4 tetrahedra that share corners with six equivalent Se(1)Lu6 octahedra, corners with six equivalent O(1)Lu4 tetrahedra, edges with three equivalent Se(1)Lu6 octahedra, and edges with three equivalent O(1)Lu4 tetrahedra. The corner-sharing octahedral tilt angles range from 28-48°.