Sm4Bi2O is (La,Ba)CuO4 structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a linear geometry to four equivalent Bi(1) and two equivalent O(1) atoms. In the second Sm site, Sm(2) is bonded to five equivalent Bi(1) and one O(1) atom to form a mixture of distorted edge and corner-sharing SmBi5O octahedra. The corner-sharing octahedral tilt angles range from 0-21°. Bi(1) is bonded in a 9-coordinate geometry to four equivalent Sm(1) and five equivalent Sm(2) atoms. O(1) is bonded to two equivalent Sm(2) and four equivalent Sm(1) atoms to form corner-sharing OSm6 octahedra. The corner-sharing octahedra are not tilted.
Sm4Bi2O is (La,Ba)CuO4 structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a linear geometry to four equivalent Bi(1) and two equivalent O(1) atoms. All Sm(1)-Bi(1) bond lengths are 3.38 Å. Both Sm(1)-O(1) bond lengths are 2.34 Å. In the second Sm site, Sm(2) is bonded to five equivalent Bi(1) and one O(1) atom to form a mixture of distorted edge and corner-sharing SmBi5O octahedra. The corner-sharing octahedral tilt angles range from 0-21°. There is one shorter (3.23 Å) and four longer (3.37 Å) Sm(2)-Bi(1) bond lengths. The Sm(2)-O(1) bond length is 3.05 Å. Bi(1) is bonded in a 9-coordinate geometry to four equivalent Sm(1) and five equivalent Sm(2) atoms. O(1) is bonded to two equivalent Sm(2) and four equivalent Sm(1) atoms to form corner-sharing OSm6 octahedra. The corner-sharing octahedra are not tilted.