Materials Data on BaTe4O9 by Materials Project
BaTe4O9 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Ba2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Ba–O bond distances ranging from 2.69–3.32 Å. There are four inequivalent Te4+ sites. In the first Te4+ site, Te4+ is bonded in a distorted rectangular see-saw-like geometry to four O2- atoms. There are a spread of Te–O bond distances ranging from 1.92–2.35 Å. In the second Te4+ site, Te4+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Te–O bond distances ranging from 1.87–2.21 Å. In the third Te4+ site, Te4+ is bonded in a 4-coordinate geometry to five O2- atoms. There are a spread of Te–O bond distances ranging from 1.87–2.85 Å. In the fourth Te4+ site, Te4+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Te–O bond distances ranging from 1.85–2.35 Å. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to three Te4+ atoms. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Te4+ atoms. In the third O2- site, O2- is bonded in a distorted water-like geometry to one Ba2+ and two equivalent Te4+ atoms. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+ and one Te4+ atom. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to two Te4+ atoms. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to one Ba2+ and two Te4+ atoms. In the seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+ and three Te4+ atoms. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to three equivalent Ba2+ and one Te4+ atom. In the ninth O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Ba2+ and one Te4+ atom.