NaDyO2 is Caswellsilverite-like structured and crystallizes in the monoclinic C2/c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form NaO6 octahedra that share corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Dy(1)O6 octahedra, corners with two equivalent Dy(2)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with three equivalent Na(2)O6 octahedra, edges with three equivalent Dy(2)O6 octahedra, and edges with four equivalent Dy(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. In the second Na site, Na(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form NaO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Dy(1)O6 octahedra, corners with two equivalent Dy(2)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with three equivalent Na(1)O6 octahedra, edges with three equivalent Dy(1)O6 octahedra, and edges with four equivalent Dy(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-13°. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form DyO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Dy(2)O6 octahedra, edges with two equivalent Dy(1)O6 octahedra, edges with three equivalent Na(2)O6 octahedra, edges with three equivalent Dy(2)O6 octahedra, and edges with four equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. In the second Dy site, Dy(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form DyO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Dy(1)O6 octahedra, edges with two equivalent Dy(2)O6 octahedra, edges with three equivalent Na(1)O6 octahedra, edges with three equivalent Dy(1)O6 octahedra, and edges with four equivalent Na(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-13°. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), two equivalent Na(2), one Dy(1), and two equivalent Dy(2) atoms to form a mixture of corner and edge-sharing ONa3Dy3 octahedra. The corner-sharing octahedral tilt angles range from 3-12°. In the second O site, O(2) is bonded to one Na(2), two equivalent Na(1), one Dy(2), and two equivalent Dy(1) atoms to form a mixture of corner and edge-sharing ONa3Dy3 octahedra. The corner-sharing octahedral tilt angles range from 3-12°.
NaDyO2 is Caswellsilverite-like structured and crystallizes in the monoclinic C2/c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form NaO6 octahedra that share corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Dy(1)O6 octahedra, corners with two equivalent Dy(2)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with three equivalent Na(2)O6 octahedra, edges with three equivalent Dy(2)O6 octahedra, and edges with four equivalent Dy(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. Both Na(1)-O(1) bond lengths are 2.41 Å. There are two shorter (2.39 Å) and two longer (2.70 Å) Na(1)-O(2) bond lengths. In the second Na site, Na(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form NaO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Dy(1)O6 octahedra, corners with two equivalent Dy(2)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with three equivalent Na(1)O6 octahedra, edges with three equivalent Dy(1)O6 octahedra, and edges with four equivalent Dy(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-13°. Both Na(2)-O(2) bond lengths are 2.37 Å. There are two shorter (2.40 Å) and two longer (2.69 Å) Na(2)-O(1) bond lengths. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form DyO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Dy(2)O6 octahedra, edges with two equivalent Dy(1)O6 octahedra, edges with three equivalent Na(2)O6 octahedra, edges with three equivalent Dy(2)O6 octahedra, and edges with four equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. Both Dy(1)-O(1) bond lengths are 2.30 Å. There are two shorter (2.28 Å) and two longer (2.30 Å) Dy(1)-O(2) bond lengths. In the second Dy site, Dy(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form DyO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Dy(1)O6 octahedra, edges with two equivalent Dy(2)O6 octahedra, edges with three equivalent Na(1)O6 octahedra, edges with three equivalent Dy(1)O6 octahedra, and edges with four equivalent Na(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-13°. Both Dy(2)-O(2) bond lengths are 2.29 Å. All Dy(2)-O(1) bond lengths are 2.29 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), two equivalent Na(2), one Dy(1), and two equivalent Dy(2) atoms to form a mixture of corner and edge-sharing ONa3Dy3 octahedra. The corner-sharing octahedral tilt angles range from 3-12°. In the second O site, O(2) is bonded to one Na(2), two equivalent Na(1), one Dy(2), and two equivalent Dy(1) atoms to form a mixture of corner and edge-sharing ONa3Dy3 octahedra. The corner-sharing octahedral tilt angles range from 3-12°.