Materials Data on Ba3SiO by Materials Project
Ba3SiO is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 2-coordinate geometry to two equivalent Si4- and two equivalent O2- atoms. There are one shorter (3.35 Å) and one longer (3.42 Å) Ba–Si bond lengths. Both Ba–O bond lengths are 2.79 Å. In the second Ba2+ site, Ba2+ is bonded in a 2-coordinate geometry to three equivalent Si4- and two equivalent O2- atoms. There are a spread of Ba–Si bond distances ranging from 3.32–3.77 Å. There are one shorter (2.77 Å) and one longer (2.83 Å) Ba–O bond lengths. Si4- is bonded in a 8-coordinate geometry to eight Ba2+ atoms. O2- is bonded to six Ba2+ atoms to form corner-sharing OBa6 octahedra. The corner-sharing octahedra tilt angles range from 26–28°.