Dy2O3 crystallizes in the trigonal P-3m1 space group. Dy(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 Dy(1) atoms to form ODy4 tetrahedra that share corners with six equivalent O(2)Dy6 octahedra, corners with six equivalent O(1)Dy4 tetrahedra, edges with three equivalent O(2)Dy6 octahedra, and edges with three equivalent O(1)Dy4 tetrahedra. The corner-sharing octahedral tilt angles range from 18-56°. In the second O site, O(2) is bonded to six equivalent Dy(1) atoms to form ODy6 octahedra that share corners with twelve equivalent O(1)Dy4 tetrahedra, edges with six equivalent O(2)Dy6 octahedra, and edges with six equivalent O(1)Dy4 tetrahedra.
Dy2O3 crystallizes in the trigonal P-3m1 space group. Dy(1) is bonded in a 7-coordinate geometry to three equivalent O(2) and four equivalent O(1) atoms. All Dy(1)-O(2) bond lengths are 2.56 Å. There are three shorter (2.20 Å) and one longer (2.31 Å) Dy(1)-O(1) bond length. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Dy(1) atoms to form ODy4 tetrahedra that share corners with six equivalent O(2)Dy6 octahedra, corners with six equivalent O(1)Dy4 tetrahedra, edges with three equivalent O(2)Dy6 octahedra, and edges with three equivalent O(1)Dy4 tetrahedra. The corner-sharing octahedral tilt angles range from 18-56°. In the second O site, O(2) is bonded to six equivalent Dy(1) atoms to form ODy6 octahedra that share corners with twelve equivalent O(1)Dy4 tetrahedra, edges with six equivalent O(2)Dy6 octahedra, and edges with six equivalent O(1)Dy4 tetrahedra.