Lu2O3 crystallizes in the trigonal P-3m1 space group. Lu(1) is bonded in a 7-coordinate geometry to three equivalent O(2) and four equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Lu(1) atoms to form OLu4 tetrahedra that share corners with six equivalent O(2)Lu6 octahedra, corners with six equivalent O(1)Lu4 tetrahedra, edges with three equivalent O(2)Lu6 octahedra, and edges with three equivalent O(1)Lu4 tetrahedra. The corner-sharing octahedral tilt angles range from 19-55°. In the second O site, O(2) is bonded to six equivalent Lu(1) atoms to form OLu6 octahedra that share corners with twelve equivalent O(1)Lu4 tetrahedra, edges with six equivalent O(2)Lu6 octahedra, and edges with six equivalent O(1)Lu4 tetrahedra.
Lu2O3 crystallizes in the trigonal P-3m1 space group. Lu(1) is bonded in a 7-coordinate geometry to three equivalent O(2) and four equivalent O(1) atoms. All Lu(1)-O(2) bond lengths are 2.49 Å. There are three shorter (2.12 Å) and one longer (2.26 Å) Lu(1)-O(1) bond length. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Lu(1) atoms to form OLu4 tetrahedra that share corners with six equivalent O(2)Lu6 octahedra, corners with six equivalent O(1)Lu4 tetrahedra, edges with three equivalent O(2)Lu6 octahedra, and edges with three equivalent O(1)Lu4 tetrahedra. The corner-sharing octahedral tilt angles range from 19-55°. In the second O site, O(2) is bonded to six equivalent Lu(1) atoms to form OLu6 octahedra that share corners with twelve equivalent O(1)Lu4 tetrahedra, edges with six equivalent O(2)Lu6 octahedra, and edges with six equivalent O(1)Lu4 tetrahedra.