DOE OSTI2020
K3AgO2 is Pb (Zr_0.50 Ti_0.48) O_3-like structured and crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. there are twelve inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a distorted rectangular see-saw-like geometry to four O2- atoms. There are a spread of K–O bond distances ranging from 2.65–2.93 Å. In the second K1+ site, K1+ is bonded in a 2-coordinate geometry to four O2- atoms. There are a spread of K–O bond distances ranging from 2.54–3.19 Å. In the third K1+ site, K1+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of K–O bond distances ranging from 2.72–2.86 Å. In the fourth K1+ site, K1+ is bonded to four O2- atoms to form distorted corner-sharing KO4 tetrahedra. There are a spread of K–O bond distances ranging from 2.79–2.93 Å. In the fifth K1+ site, K1+ is bonded in a 3-coordinate geometry to four O2- atoms. There are a spread of K–O bond distances ranging from 2.55–3.26 Å. In the sixth K1+ site, K1+ is bonded to four O2- atoms to form distorted corner-sharing KO4 tetrahedra. There are a spread of K–O bond distances ranging from 2.71–2.89 Å. In the seventh K1+ site, K1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of K–O bond distances ranging from 2.81–3.11 Å. In the eighth K1+ site, K1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of K–O bond distances ranging from 2.74–3.23 Å. In the ninth K1+ site, K1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of K–O bond distances ranging from 2.72–3.06 Å. In the tenth K1+ site, K1+ is bonded in a distorted trigonal non-coplanar geometry to four O2- atoms. There are a spread of K–O bond distances ranging from 2.71–3.37 Å. In the eleventh K1+ site, K1+ is bonded in a 2-coordinate geometry to four O2- atoms. There are a spread of K–O bond distances ranging from 2.60–3.32 Å. In the twelfth K1+ site, K1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of K–O bond distances ranging from 2.76–3.13 Å. There are four inequivalent Ag1+ sites. In the first Ag1+ site, Ag1+ is bonded in a linear geometry to two O2- atoms. Both Ag–O bond lengths are 2.04 Å. In the second Ag1+ site, Ag1+ is bonded in a linear geometry to two O2- atoms. There are one shorter (2.04 Å) and one longer (2.06 Å) Ag–O bond lengths. In the third Ag1+ site, Ag1+ is bonded in a linear geometry to two O2- atoms. There are one shorter (2.04 Å) and one longer (2.07 Å) Ag–O bond lengths. In the fourth Ag1+ site, Ag1+ is bonded in a linear geometry to two O2- atoms. There are one shorter (2.05 Å) and one longer (2.06 Å) Ag–O bond lengths. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 7-coordinate geometry to six K1+ and one Ag1+ atom. In the second O2- site, O2- is bonded in a 7-coordinate geometry to six K1+ and one Ag1+ atom. In the third O2- site, O2- is bonded to five K1+ and one Ag1+ atom to form distorted edge-sharing OK5Ag octahedra. In the fourth O2- site, O2- is bonded in a 7-coordinate geometry to six K1+ and one Ag1+ atom. In the fifth O2- site, O2- is bonded to five K1+ and one Ag1+ atom to form distorted edge-sharing OK5Ag octahedra. In the sixth O2- site, O2- is bonded in a 7-coordinate geometry to six K1+ and one Ag1+ atom. In the seventh O2- site, O2- is bonded in a 1-coordinate geometry to seven K1+ and one Ag1+ atom. In the eighth O2- site, O2- is bonded in a 7-coordinate geometry to six K1+ and one Ag1+ atom.