Ba2Bi2O5 crystallizes in the monoclinic P2_1/c space group. Ba(1) is bonded in a 9-coordinate geometry to one O(3), four equivalent O(1), and four equivalent O(2) atoms. Bi(1) is bonded in a rectangular see-saw-like geometry to one O(2), one O(3), and two equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to four equivalent Ba(1) and two equivalent Bi(1) atoms. In the second O site, O(2) is bonded in a 5-coordinate geometry to four equivalent Ba(1) and one Bi(1) atom. In the third O site, O(3) is bonded in a square co-planar geometry to two equivalent Ba(1) and two equivalent Bi(1) atoms.
Ba2Bi2O5 crystallizes in the monoclinic P2_1/c space group. Ba(1) is bonded in a 9-coordinate geometry to one O(3), four equivalent O(1), and four equivalent O(2) atoms. The Ba(1)-O(3) bond length is 2.88 Å. There are a spread of Ba(1)-O(1) bond distances ranging from 2.85-3.20 Å. There are a spread of Ba(1)-O(2) bond distances ranging from 2.61-3.28 Å. Bi(1) is bonded in a rectangular see-saw-like geometry to one O(2), one O(3), and two equivalent O(1) atoms. The Bi(1)-O(2) bond length is 2.08 Å. The Bi(1)-O(3) bond length is 2.27 Å. There is one shorter (2.11 Å) and one longer (2.42 Å) Bi(1)-O(1) bond length. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to four equivalent Ba(1) and two equivalent Bi(1) atoms. In the second O site, O(2) is bonded in a 5-coordinate geometry to four equivalent Ba(1) and one Bi(1) atom. In the third O site, O(3) is bonded in a square co-planar geometry to two equivalent Ba(1) and two equivalent Bi(1) atoms.