Ag7Sb9O25 crystallizes in the trigonal R3m space group. There are three inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a hexagonal planar geometry to one O(2), one O(6), two equivalent O(1), and two equivalent O(3) atoms. In the second Ag site, Ag(2) is bonded in a hexagonal planar geometry to three equivalent O(4) and three equivalent O(6) atoms. In the third Ag site, Ag(3) is bonded in a hexagonal planar geometry to one O(4), one O(7), two equivalent O(5), and two equivalent O(8) atoms. There are five inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 3-coordinate geometry to three equivalent O(2) and three equivalent O(7) atoms. In the second Sb site, Sb(2) is bonded to one O(3), one O(5), two equivalent O(4), and two equivalent O(6) atoms to form corner-sharing SbO6 octahedra. The corner-sharing octahedral tilt angles range from 46-47°. In the third Sb site, Sb(3) is bonded to one O(1), one O(8), one O(9), two equivalent O(2), and two equivalent O(7) atoms to form SbO7 pentagonal bipyramids that share  a cornercorner with one Sb(4)O6 octahedra,  a cornercorner with one Sb(5)O6 octahedra, corners with two equivalent Sb(3)O7 pentagonal bipyramids, and edges with two equivalent Sb(3)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 46-47°. In the fourth Sb site, Sb(4) is bonded to three equivalent O(1) and three equivalent O(3) atoms to form SbO6 octahedra that share corners with three equivalent Sb(2)O6 octahedra and corners with three equivalent Sb(3)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 46°. In the fifth Sb site, Sb(5) is bonded to three equivalent O(5) and three equivalent O(8) atoms to form SbO6 octahedra that share corners with three equivalent Sb(2)O6 octahedra and corners with three equivalent Sb(3)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 46°. There are nine inequivalent O sites. In the first O site, O(9) is bonded in a trigonal planar geometry to three equivalent Sb(3) atoms. In the second O site, O(7) is bonded in a 4-coordinate geometry to one Ag(3), one Sb(1), and two equivalent Sb(3) atoms. In the third O site, O(1) is bonded to two equivalent Ag(1), one Sb(3), and one Sb(4) atom to form distorted OAg2Sb2 tetrahedra that share corners with four equivalent O(1)Ag2Sb2 tetrahedra and edges with two equivalent O(2)AgSb3 tetrahedra. In the fourth O site, O(2) is bonded to one Ag(1), one Sb(1), and two equivalent Sb(3) atoms to form distorted OAgSb3 tetrahedra that share corners with four equivalent O(2)AgSb3 tetrahedra and edges with two equivalent O(1)Ag2Sb2 tetrahedra. In the fifth O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Ag(1), one Sb(2), and one Sb(4) atom. In the sixth O site, O(4) is bonded in a 4-coordinate geometry to one Ag(2), one Ag(3), and two equivalent Sb(2) atoms. In the seventh O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Ag(3), one Sb(2), and one Sb(5) atom. In the eighth O site, O(6) is bonded in a 4-coordinate geometry to one Ag(1), one Ag(2), and two equivalent Sb(2) atoms. In the ninth O site, O(8) is bonded in a 4-coordinate geometry to two equivalent Ag(3), one Sb(3), and one Sb(5) atom.
Ag7Sb9O25 crystallizes in the trigonal R3m space group. There are three inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a hexagonal planar geometry to one O(2), one O(6), two equivalent O(1), and two equivalent O(3) atoms. The Ag(1)-O(2) bond length is 2.58 Å. The Ag(1)-O(6) bond length is 2.57 Å. Both Ag(1)-O(1) bond lengths are 2.57 Å. Both Ag(1)-O(3) bond lengths are 2.57 Å. In the second Ag site, Ag(2) is bonded in a hexagonal planar geometry to three equivalent O(4) and three equivalent O(6) atoms. All Ag(2)-O(4) bond lengths are 2.57 Å. All Ag(2)-O(6) bond lengths are 2.58 Å. In the third Ag site, Ag(3) is bonded in a hexagonal planar geometry to one O(4), one O(7), two equivalent O(5), and two equivalent O(8) atoms. The Ag(3)-O(4) bond length is 2.58 Å. The Ag(3)-O(7) bond length is 2.56 Å. Both Ag(3)-O(5) bond lengths are 2.58 Å. Both Ag(3)-O(8) bond lengths are 2.61 Å. There are five inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 3-coordinate geometry to three equivalent O(2) and three equivalent O(7) atoms. All Sb(1)-O(2) bond lengths are 2.08 Å. All Sb(1)-O(7) bond lengths are 2.63 Å. In the second Sb site, Sb(2) is bonded to one O(3), one O(5), two equivalent O(4), and two equivalent O(6) atoms to form corner-sharing SbO6 octahedra. The corner-sharing octahedral tilt angles range from 46-47°. The Sb(2)-O(3) bond length is 2.01 Å. The Sb(2)-O(5) bond length is 2.00 Å. Both Sb(2)-O(4) bond lengths are 2.00 Å. Both Sb(2)-O(6) bond lengths are 2.00 Å. In the third Sb site, Sb(3) is bonded to one O(1), one O(8), one O(9), two equivalent O(2), and two equivalent O(7) atoms to form SbO7 pentagonal bipyramids that share  a cornercorner with one Sb(4)O6 octahedra,  a cornercorner with one Sb(5)O6 octahedra, corners with two equivalent Sb(3)O7 pentagonal bipyramids, and edges with two equivalent Sb(3)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 46-47°. The Sb(3)-O(1) bond length is 2.00 Å. The Sb(3)-O(8) bond length is 2.00 Å. The Sb(3)-O(9) bond length is 2.11 Å. Both Sb(3)-O(2) bond lengths are 2.28 Å. Both Sb(3)-O(7) bond lengths are 2.02 Å. In the fourth Sb site, Sb(4) is bonded to three equivalent O(1) and three equivalent O(3) atoms to form SbO6 octahedra that share corners with three equivalent Sb(2)O6 octahedra and corners with three equivalent Sb(3)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 46°. All Sb(4)-O(1) bond lengths are 2.02 Å. All Sb(4)-O(3) bond lengths are 2.00 Å. In the fifth Sb site, Sb(5) is bonded to three equivalent O(5) and three equivalent O(8) atoms to form SbO6 octahedra that share corners with three equivalent Sb(2)O6 octahedra and corners with three equivalent Sb(3)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 46°. All Sb(5)-O(5) bond lengths are 2.00 Å. All Sb(5)-O(8) bond lengths are 1.99 Å. There are nine inequivalent O sites. In the first O site, O(9) is bonded in a trigonal planar geometry to three equivalent Sb(3) atoms. In the second O site, O(7) is bonded in a 4-coordinate geometry to one Ag(3), one Sb(1), and two equivalent Sb(3) atoms. In the third O site, O(1) is bonded to two equivalent Ag(1), one Sb(3), and one Sb(4) atom to form distorted OAg2Sb2 tetrahedra that share corners with four equivalent O(1)Ag2Sb2 tetrahedra and edges with two equivalent O(2)AgSb3 tetrahedra. In the fourth O site, O(2) is bonded to one Ag(1), one Sb(1), and two equivalent Sb(3) atoms to form distorted OAgSb3 tetrahedra that share corners with four equivalent O(2)AgSb3 tetrahedra and edges with two equivalent O(1)Ag2Sb2 tetrahedra. In the fifth O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Ag(1), one Sb(2), and one Sb(4) atom. In the sixth O site, O(4) is bonded in a 4-coordinate geometry to one Ag(2), one Ag(3), and two equivalent Sb(2) atoms. In the seventh O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Ag(3), one Sb(2), and one Sb(5) atom. In the eighth O site, O(6) is bonded in a 4-coordinate geometry to one Ag(1), one Ag(2), and two equivalent Sb(2) atoms. In the ninth O site, O(8) is bonded in a 4-coordinate geometry to two equivalent Ag(3), one Sb(3), and one Sb(5) atom.