Materials Data on Ba2Bi2O5 by Materials Project
Ba2Bi2O5 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Ba2+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Ba–O bond distances ranging from 2.62–2.91 Å. Bi3+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Bi–O bond distances ranging from 2.10–2.45 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Ba2+ and two equivalent Bi3+ atoms. In the second O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three equivalent Ba2+ and one Bi3+ atom. In the third O2- site, O2- is bonded in a square co-planar geometry to two equivalent Ba2+ and two equivalent Bi3+ atoms.