Ti8BiO7 crystallizes in the orthorhombic Cmmm space group. There are three inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a distorted rectangular see-saw-like geometry to one Bi(1), two equivalent O(1), and two equivalent O(2) atoms. In the second Ti site, Ti(2) is bonded in a rectangular see-saw-like geometry to two equivalent Bi(1), two equivalent O(1), and two equivalent O(3) atoms. In the third Ti site, Ti(3) is bonded in a distorted T-shaped geometry to one O(2) and two equivalent O(1) atoms. Bi(1) is bonded in a 10-coordinate geometry to four equivalent Ti(1), four equivalent Ti(2), and two equivalent Bi(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Ti(2), one Ti(3), and two equivalent Ti(1) atoms. In the second O site, O(2) is bonded to one Ti(3) and four equivalent Ti(1) atoms to form edge-sharing OTi5 square pyramids. In the third O site, O(3) is bonded in a square co-planar geometry to four equivalent Ti(2) atoms.
Ti8BiO7 crystallizes in the orthorhombic Cmmm space group. There are three inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a distorted rectangular see-saw-like geometry to one Bi(1), two equivalent O(1), and two equivalent O(2) atoms. The Ti(1)-Bi(1) bond length is 3.23 Å. Both Ti(1)-O(1) bond lengths are 2.06 Å. Both Ti(1)-O(2) bond lengths are 2.09 Å. In the second Ti site, Ti(2) is bonded in a rectangular see-saw-like geometry to two equivalent Bi(1), two equivalent O(1), and two equivalent O(3) atoms. Both Ti(2)-Bi(1) bond lengths are 2.98 Å. Both Ti(2)-O(1) bond lengths are 2.04 Å. Both Ti(2)-O(3) bond lengths are 2.04 Å. In the third Ti site, Ti(3) is bonded in a distorted T-shaped geometry to one O(2) and two equivalent O(1) atoms. The Ti(3)-O(2) bond length is 2.01 Å. Both Ti(3)-O(1) bond lengths are 1.98 Å. Bi(1) is bonded in a 10-coordinate geometry to four equivalent Ti(1), four equivalent Ti(2), and two equivalent Bi(1) atoms. Both Bi(1)-Bi(1) bond lengths are 3.04 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Ti(2), one Ti(3), and two equivalent Ti(1) atoms. In the second O site, O(2) is bonded to one Ti(3) and four equivalent Ti(1) atoms to form edge-sharing OTi5 square pyramids. In the third O site, O(3) is bonded in a square co-planar geometry to four equivalent Ti(2) atoms.