Sm2AlO3N is (La,Ba)CuO4-derived structured and crystallizes in the tetragonal I4mm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 9-coordinate geometry to four equivalent N(1), one O(2), and four equivalent O(1) atoms. In the second Sm site, Sm(2) is bonded in a 9-coordinate geometry to one N(1), four equivalent O(1), and four equivalent O(2) atoms. Al(1) is bonded to one N(1), one O(2), and four equivalent O(1) atoms to form corner-sharing AlNO5 octahedra. The corner-sharing octahedral tilt angles are 11°. N(1) is bonded to one Sm(2), four equivalent Sm(1), and one Al(1) atom to form distorted NSm5Al octahedra that share  a cornercorner with one O(2)Sm5Al octahedra, corners with four equivalent N(1)Sm5Al octahedra, corners with twelve equivalent O(1)Sm4Al2 octahedra, edges with four equivalent N(1)Sm5Al octahedra, edges with four equivalent O(2)Sm5Al octahedra, and faces with four equivalent O(1)Sm4Al2 octahedra. The corner-sharing octahedral tilt angles range from 0-55°. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sm(1), two equivalent Sm(2), and two equivalent Al(1) atoms to form distorted OSm4Al2 octahedra that share corners with two equivalent O(1)Sm4Al2 octahedra, corners with six equivalent N(1)Sm5Al octahedra, corners with six equivalent O(2)Sm5Al octahedra, edges with two equivalent O(1)Sm4Al2 octahedra, faces with two equivalent N(1)Sm5Al octahedra, faces with two equivalent O(2)Sm5Al octahedra, and faces with four equivalent O(1)Sm4Al2 octahedra. The corner-sharing octahedral tilt angles range from 11-55°. In the second O site, O(2) is bonded to one Sm(1), four equivalent Sm(2), and one Al(1) atom to form OSm5Al octahedra that share  a cornercorner with one N(1)Sm5Al octahedra, corners with four equivalent O(2)Sm5Al octahedra, corners with twelve equivalent O(1)Sm4Al2 octahedra, edges with four equivalent N(1)Sm5Al octahedra, edges with four equivalent O(2)Sm5Al octahedra, and faces with four equivalent O(1)Sm4Al2 octahedra. The corner-sharing octahedral tilt angles range from 0-54°.
Sm2AlO3N is (La,Ba)CuO4-derived structured and crystallizes in the tetragonal I4mm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 9-coordinate geometry to four equivalent N(1), one O(2), and four equivalent O(1) atoms. All Sm(1)-N(1) bond lengths are 2.63 Å. The Sm(1)-O(2) bond length is 2.32 Å. All Sm(1)-O(1) bond lengths are 2.65 Å. In the second Sm site, Sm(2) is bonded in a 9-coordinate geometry to one N(1), four equivalent O(1), and four equivalent O(2) atoms. The Sm(2)-N(1) bond length is 2.33 Å. All Sm(2)-O(1) bond lengths are 2.52 Å. All Sm(2)-O(2) bond lengths are 2.63 Å. Al(1) is bonded to one N(1), one O(2), and four equivalent O(1) atoms to form corner-sharing AlNO5 octahedra. The corner-sharing octahedral tilt angles are 11°. The Al(1)-N(1) bond length is 2.01 Å. The Al(1)-O(2) bond length is 2.17 Å. All Al(1)-O(1) bond lengths are 1.86 Å. N(1) is bonded to one Sm(2), four equivalent Sm(1), and one Al(1) atom to form distorted NSm5Al octahedra that share  a cornercorner with one O(2)Sm5Al octahedra, corners with four equivalent N(1)Sm5Al octahedra, corners with twelve equivalent O(1)Sm4Al2 octahedra, edges with four equivalent N(1)Sm5Al octahedra, edges with four equivalent O(2)Sm5Al octahedra, and faces with four equivalent O(1)Sm4Al2 octahedra. The corner-sharing octahedral tilt angles range from 0-55°. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sm(1), two equivalent Sm(2), and two equivalent Al(1) atoms to form distorted OSm4Al2 octahedra that share corners with two equivalent O(1)Sm4Al2 octahedra, corners with six equivalent N(1)Sm5Al octahedra, corners with six equivalent O(2)Sm5Al octahedra, edges with two equivalent O(1)Sm4Al2 octahedra, faces with two equivalent N(1)Sm5Al octahedra, faces with two equivalent O(2)Sm5Al octahedra, and faces with four equivalent O(1)Sm4Al2 octahedra. The corner-sharing octahedral tilt angles range from 11-55°. In the second O site, O(2) is bonded to one Sm(1), four equivalent Sm(2), and one Al(1) atom to form OSm5Al octahedra that share  a cornercorner with one N(1)Sm5Al octahedra, corners with four equivalent O(2)Sm5Al octahedra, corners with twelve equivalent O(1)Sm4Al2 octahedra, edges with four equivalent N(1)Sm5Al octahedra, edges with four equivalent O(2)Sm5Al octahedra, and faces with four equivalent O(1)Sm4Al2 octahedra. The corner-sharing octahedral tilt angles range from 0-54°.