Materials Data on KGaO2 by Materials Project
KGaO2 crystallizes in the orthorhombic Pbca space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 4-coordinate geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.80–3.36 Å. In the second K1+ site, K1+ is bonded in a 5-coordinate geometry to six O2- atoms. There are a spread of K–O bond distances ranging from 2.65–3.28 Å. There are two inequivalent Ga3+ sites. In the first 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 (1.88 Å) Ga–O bond length. In the second Ga3+ site, Ga3+ is bonded to four O2- atoms to form corner-sharing GaO4 tetrahedra. There is two shorter (1.87 Å) and two longer (1.88 Å) Ga–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to four K1+ and two equivalent Ga3+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to four K1+ and two Ga3+ atoms. In the third O2- site, O2- is bonded in a 2-coordinate geometry to three K1+ and two equivalent Ga3+ atoms. In the fourth O2- site, O2- is bonded in a 5-coordinate geometry to three K1+ and two Ga3+ atoms.