Bi2TiO5 crystallizes in the orthorhombic Pnma space group. Ti(1) is bonded to one O(2), one O(3), one O(4), and two equivalent O(5) atoms to form distorted corner-sharing TiO5 trigonal bipyramids. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 7-coordinate geometry to one O(1), one O(3), one O(5), two equivalent O(2), and two equivalent O(4) atoms. In the second Bi site, Bi(2) is bonded in a 7-coordinate geometry to one O(4), one O(5), two equivalent O(3), and three equivalent O(1) atoms. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Bi(1) and three equivalent Bi(2) atoms to form a mixture of edge and corner-sharing OBi4 tetrahedra. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Ti(1) and two equivalent Bi(1) atoms. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ti(1), one Bi(1), and two equivalent Bi(2) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Ti(1), one Bi(2), and two equivalent Bi(1) atoms. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Ti(1), one Bi(1), and one Bi(2) atom.
Bi2TiO5 crystallizes in the orthorhombic Pnma space group. Ti(1) is bonded to one O(2), one O(3), one O(4), and two equivalent O(5) atoms to form distorted corner-sharing TiO5 trigonal bipyramids. The Ti(1)-O(2) bond length is 1.78 Å. The Ti(1)-O(3) bond length is 1.89 Å. The Ti(1)-O(4) bond length is 1.89 Å. Both Ti(1)-O(5) bond lengths are 2.01 Å. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 7-coordinate geometry to one O(1), one O(3), one O(5), two equivalent O(2), and two equivalent O(4) atoms. The Bi(1)-O(1) bond length is 2.19 Å. The Bi(1)-O(3) bond length is 2.74 Å. The Bi(1)-O(5) bond length is 2.52 Å. Both Bi(1)-O(2) bond lengths are 2.56 Å. Both Bi(1)-O(4) bond lengths are 2.29 Å. In the second Bi site, Bi(2) is bonded in a 7-coordinate geometry to one O(4), one O(5), two equivalent O(3), and three equivalent O(1) atoms. The Bi(2)-O(4) bond length is 2.72 Å. The Bi(2)-O(5) bond length is 2.39 Å. Both Bi(2)-O(3) bond lengths are 2.35 Å. There is one shorter (2.26 Å) and two longer (2.57 Å) Bi(2)-O(1) bond lengths. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Bi(1) and three equivalent Bi(2) atoms to form a mixture of edge and corner-sharing OBi4 tetrahedra. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Ti(1) and two equivalent Bi(1) atoms. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ti(1), one Bi(1), and two equivalent Bi(2) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Ti(1), one Bi(2), and two equivalent Bi(1) atoms. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Ti(1), one Bi(1), and one Bi(2) atom.