MgNbAgO3 crystallizes in the tetragonal P4/mmm space group. Mg(1) is bonded to two equivalent Ag(1) and four equivalent O(1) atoms to form MgAg2O4 octahedra that share corners with six equivalent Mg(1)Ag2O4 octahedra and edges with four equivalent Nb(1)O6 octahedra. The corner-sharing octahedra are not tilted. Nb(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form NbO6 octahedra that share corners with six equivalent Nb(1)O6 octahedra and edges with four equivalent Mg(1)Ag2O4 octahedra. The corner-sharing octahedra are not tilted. Ag(1) is bonded in a linear geometry to two equivalent Mg(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a square co-planar geometry to two equivalent Mg(1) and two equivalent Nb(1) atoms. In the second O site, O(2) is bonded in a linear geometry to two equivalent Nb(1) atoms.
MgNbAgO3 crystallizes in the tetragonal P4/mmm space group. Mg(1) is bonded to two equivalent Ag(1) and four equivalent O(1) atoms to form MgAg2O4 octahedra that share corners with six equivalent Mg(1)Ag2O4 octahedra and edges with four equivalent Nb(1)O6 octahedra. The corner-sharing octahedra are not tilted. Both Mg(1)-Ag(1) bond lengths are 2.34 Å. All Mg(1)-O(1) bond lengths are 2.08 Å. Nb(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form NbO6 octahedra that share corners with six equivalent Nb(1)O6 octahedra and edges with four equivalent Mg(1)Ag2O4 octahedra. The corner-sharing octahedra are not tilted. Both Nb(1)-O(2) bond lengths are 2.34 Å. All Nb(1)-O(1) bond lengths are 2.08 Å. Ag(1) is bonded in a linear geometry to two equivalent Mg(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a square co-planar geometry to two equivalent Mg(1) and two equivalent Nb(1) atoms. In the second O site, O(2) is bonded in a linear geometry to two equivalent Nb(1) atoms.