Bi2O3 crystallizes in the triclinic P1 space group. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 3-coordinate geometry to one O(1) and two equivalent O(3) atoms. In the second Bi site, Bi(2) is bonded in a 5-coordinate geometry to one O(1), one O(3), and three equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Bi(1) and one Bi(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to three equivalent Bi(2) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Bi(2) and two equivalent Bi(1) atoms.
Bi2O3 crystallizes in the triclinic P1 space group. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 3-coordinate geometry to one O(1) and two equivalent O(3) atoms. The Bi(1)-O(1) bond length is 1.46 Å. There is one shorter (2.21 Å) and one longer (2.54 Å) Bi(1)-O(3) bond length. In the second Bi site, Bi(2) is bonded in a 5-coordinate geometry to one O(1), one O(3), and three equivalent O(2) atoms. The Bi(2)-O(1) bond length is 2.69 Å. The Bi(2)-O(3) bond length is 2.68 Å. There are a spread of Bi(2)-O(2) bond distances ranging from 2.18-2.39 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Bi(1) and one Bi(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to three equivalent Bi(2) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Bi(2) and two equivalent Bi(1) atoms.