Sr4Bi2O is (La,Ba)CuO4 structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to five equivalent Bi(1) and one O(1) atom. In the second Sr site, Sr(2) is bonded in a linear geometry to four equivalent Bi(1) and two equivalent O(1) atoms. Bi(1) is bonded in a 9-coordinate geometry to four equivalent Sr(2) and five equivalent Sr(1) atoms. O(1) is bonded to two equivalent Sr(1) and four equivalent Sr(2) atoms to form corner-sharing OSr6 octahedra. The corner-sharing octahedra are not tilted.
Sr4Bi2O is (La,Ba)CuO4 structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to five equivalent Bi(1) and one O(1) atom. There is one shorter (3.42 Å) and four longer (3.59 Å) Sr(1)-Bi(1) bond lengths. The Sr(1)-O(1) bond length is 2.93 Å. In the second Sr site, Sr(2) is bonded in a linear geometry to four equivalent Bi(1) and two equivalent O(1) atoms. All Sr(2)-Bi(1) bond lengths are 3.51 Å. Both Sr(2)-O(1) bond lengths are 2.52 Å. Bi(1) is bonded in a 9-coordinate geometry to four equivalent Sr(2) and five equivalent Sr(1) atoms. O(1) is bonded to two equivalent Sr(1) and four equivalent Sr(2) atoms to form corner-sharing OSr6 octahedra. The corner-sharing octahedra are not tilted.