Bi2O5 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(3), one O(5), two equivalent O(1), and two equivalent O(2) atoms to form a mixture of distorted corner and edge-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 23-49°. In the second Bi site, Bi(2) is bonded to one O(1), one O(2), one O(3), one O(5), and two equivalent O(4) atoms to form a mixture of distorted corner and edge-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 23-49°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Bi(2) and two equivalent Bi(1) atoms. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Bi(2) and two equivalent Bi(1) atoms. In the third O site, O(3) is bonded in a water-like geometry to one Bi(1) and one Bi(2) atom. In the fourth O site, O(4) is bonded in a water-like geometry to two equivalent Bi(2) atoms. In the fifth O site, O(5) is bonded in a water-like geometry to one Bi(1) and one Bi(2) atom.
Bi2O5 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(3), one O(5), two equivalent O(1), and two equivalent O(2) atoms to form a mixture of distorted corner and edge-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 23-49°. The Bi(1)-O(3) bond length is 2.18 Å. The Bi(1)-O(5) bond length is 2.10 Å. There is one shorter (2.18 Å) and one longer (2.19 Å) Bi(1)-O(1) bond length. There is one shorter (2.23 Å) and one longer (2.24 Å) Bi(1)-O(2) bond length. In the second Bi site, Bi(2) is bonded to one O(1), one O(2), one O(3), one O(5), and two equivalent O(4) atoms to form a mixture of distorted corner and edge-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 23-49°. The Bi(2)-O(1) bond length is 2.32 Å. The Bi(2)-O(2) bond length is 2.28 Å. The Bi(2)-O(3) bond length is 2.09 Å. The Bi(2)-O(5) bond length is 2.17 Å. There is one shorter (2.10 Å) and one longer (2.17 Å) Bi(2)-O(4) bond length. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Bi(2) and two equivalent Bi(1) atoms. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Bi(2) and two equivalent Bi(1) atoms. In the third O site, O(3) is bonded in a water-like geometry to one Bi(1) and one Bi(2) atom. In the fourth O site, O(4) is bonded in a water-like geometry to two equivalent Bi(2) atoms. In the fifth O site, O(5) is bonded in a water-like geometry to one Bi(1) and one Bi(2) atom.