DOE OSTI2020
AgMnO4 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Mn7+ is bonded to four O2- atoms to form MnO4 tetrahedra that share corners with six equivalent AgO6 octahedra. The corner-sharing octahedra tilt angles range from 36–61°. There is two shorter (1.63 Å) and two longer (1.64 Å) Mn–O bond length. Ag1+ is bonded to six O2- atoms to form distorted AgO6 octahedra that share corners with six equivalent MnO4 tetrahedra and edges with two equivalent AgO6 octahedra. There are a spread of Ag–O bond distances ranging from 2.19–2.63 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one Mn7+ and two equivalent Ag1+ atoms. In the second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Mn7+ and one Ag1+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to one Mn7+ and two equivalent Ag1+ atoms. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Mn7+ and one Ag1+ atom.