Materials Data on Ba(GaO2)2 by Materials Project
BaGa2O4 crystallizes in the hexagonal P6_3 space group. The structure is three-dimensional. there are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ba–O bond distances ranging from 2.69–3.28 Å. In the second Ba2+ site, Ba2+ is bonded in a distorted q6 geometry to nine O2- atoms. There are a spread of Ba–O bond distances ranging from 2.79–3.02 Å. There are four inequivalent Ga3+ sites. In the first Ga3+ site, Ga3+ is bonded to four O2- atoms to form corner-sharing GaO4 tetrahedra. There is two shorter (1.86 Å) and two longer (1.88 Å) Ga–O bond length. In the second Ga3+ site, Ga3+ is bonded to four O2- atoms to form corner-sharing GaO4 tetrahedra. There are a spread of Ga–O bond distances ranging from 1.85–1.87 Å. In the third Ga3+ site, Ga3+ is bonded to four O2- atoms to form corner-sharing GaO4 tetrahedra. There is three shorter (1.87 Å) and one longer (1.89 Å) Ga–O bond length. In the fourth Ga3+ site, Ga3+ is bonded to four O2- atoms to form corner-sharing GaO4 tetrahedra. There is three shorter (1.85 Å) and one longer (1.90 Å) Ga–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent Ba2+ and two Ga3+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two Ba2+ and two Ga3+ atoms. In the third O2- site, O2- is bonded in a distorted linear geometry to three equivalent Ba2+ and two Ga3+ atoms. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent Ba2+ and two Ga3+ atoms. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Ba2+ and two Ga3+ atoms. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Ba2+ and two Ga3+ atoms.