Cr3AgO8 crystallizes in the monoclinic C2/m space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form CrO6 octahedra that share corners with six equivalent Cr(2)O4 tetrahedra and edges with two equivalent Ag(1)O6 octahedra. In the second Cr site, Cr(2) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form CrO4 tetrahedra that share corners with three equivalent Cr(1)O6 octahedra and corners with three equivalent Ag(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-62°. Ag(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form AgO6 octahedra that share corners with six equivalent Cr(2)O4 tetrahedra and edges with two equivalent Cr(1)O6 octahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cr(2) and one Ag(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Cr(1) and one Cr(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Cr(1), one Cr(2), and one Ag(1) atom.
Cr3AgO8 crystallizes in the monoclinic C2/m space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form CrO6 octahedra that share corners with six equivalent Cr(2)O4 tetrahedra and edges with two equivalent Ag(1)O6 octahedra. Both Cr(1)-O(2) bond lengths are 1.93 Å. All Cr(1)-O(3) bond lengths are 1.96 Å. In the second Cr site, Cr(2) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form CrO4 tetrahedra that share corners with three equivalent Cr(1)O6 octahedra and corners with three equivalent Ag(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-62°. The Cr(2)-O(1) bond length is 1.61 Å. The Cr(2)-O(2) bond length is 1.65 Å. Both Cr(2)-O(3) bond lengths are 1.69 Å. Ag(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form AgO6 octahedra that share corners with six equivalent Cr(2)O4 tetrahedra and edges with two equivalent Cr(1)O6 octahedra. Both Ag(1)-O(1) bond lengths are 2.23 Å. All Ag(1)-O(3) bond lengths are 2.46 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cr(2) and one Ag(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Cr(1) and one Cr(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Cr(1), one Cr(2), and one Ag(1) atom.