Zn7Sb2O12 is Spinel-like structured and crystallizes in the monoclinic C2/c space group. There are five inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form ZnO4 tetrahedra that share corners with two equivalent Zn(4)O6 octahedra, corners with two equivalent Zn(5)O6 octahedra, corners with four equivalent Zn(2)O6 octahedra, and corners with four equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-63°. In the second Zn site, Zn(2) is bonded to one O(1), one O(4), one O(5), one O(6), and two equivalent O(2) atoms to form ZnO6 octahedra that share corners with two equivalent Zn(3)O4 tetrahedra, corners with four equivalent Zn(1)O4 tetrahedra,  an edgeedge with one Zn(2)O6 octahedra,  an edgeedge with one Zn(4)O6 octahedra,  an edgeedge with one Zn(5)O6 octahedra, and edges with three equivalent Sb(1)O6 octahedra. In the third Zn site, Zn(3) is bonded to two equivalent O(5) and two equivalent O(6) atoms to form ZnO4 tetrahedra that share corners with two equivalent Zn(4)O6 octahedra, corners with two equivalent Zn(5)O6 octahedra, corners with four equivalent Zn(2)O6 octahedra, and corners with four equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-63°. In the fourth Zn site, Zn(4) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form ZnO6 octahedra that share corners with two equivalent Zn(3)O4 tetrahedra, corners with four equivalent Zn(1)O4 tetrahedra, edges with two equivalent Zn(2)O6 octahedra, edges with two equivalent Zn(5)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. In the fifth Zn site, Zn(5) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(6) atoms to form ZnO6 octahedra that share corners with two equivalent Zn(3)O4 tetrahedra, corners with four equivalent Zn(1)O4 tetrahedra, edges with two equivalent Zn(2)O6 octahedra, edges with two equivalent Zn(4)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. Sb(1) is bonded to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms to form SbO6 octahedra that share corners with two equivalent Zn(3)O4 tetrahedra, corners with four equivalent Zn(1)O4 tetrahedra,  an edgeedge with one Zn(4)O6 octahedra,  an edgeedge with one Zn(5)O6 octahedra,  an edgeedge with one Sb(1)O6 octahedra, and edges with three equivalent Zn(2)O6 octahedra. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Zn(1), one Zn(2), one Zn(4), and one Zn(5) atom. In the second O site, O(2) is bonded to one Zn(1), two equivalent Zn(2), and one Sb(1) atom to form distorted edge-sharing OZn3Sb trigonal pyramids. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Zn(1), one Zn(4), one Zn(5), and one Sb(1) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Zn(1), one Zn(2), and two equivalent Sb(1) atoms. In the fifth O site, O(5) is bonded in a rectangular see-saw-like geometry to one Zn(2), one Zn(3), one Zn(4), and one Sb(1) atom. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Zn(2), one Zn(3), one Zn(5), and one Sb(1) atom.
Zn7Sb2O12 is Spinel-like structured and crystallizes in the monoclinic C2/c space group. There are five inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form ZnO4 tetrahedra that share corners with two equivalent Zn(4)O6 octahedra, corners with two equivalent Zn(5)O6 octahedra, corners with four equivalent Zn(2)O6 octahedra, and corners with four equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-63°. The Zn(1)-O(1) bond length is 1.94 Å. The Zn(1)-O(2) bond length is 2.07 Å. The Zn(1)-O(3) bond length is 2.01 Å. The Zn(1)-O(4) bond length is 2.15 Å. In the second Zn site, Zn(2) is bonded to one O(1), one O(4), one O(5), one O(6), and two equivalent O(2) atoms to form ZnO6 octahedra that share corners with two equivalent Zn(3)O4 tetrahedra, corners with four equivalent Zn(1)O4 tetrahedra,  an edgeedge with one Zn(2)O6 octahedra,  an edgeedge with one Zn(4)O6 octahedra,  an edgeedge with one Zn(5)O6 octahedra, and edges with three equivalent Sb(1)O6 octahedra. The Zn(2)-O(1) bond length is 2.02 Å. The Zn(2)-O(4) bond length is 2.25 Å. The Zn(2)-O(5) bond length is 2.13 Å. The Zn(2)-O(6) bond length is 2.17 Å. There is one shorter (2.12 Å) and one longer (2.20 Å) Zn(2)-O(2) bond length. In the third Zn site, Zn(3) is bonded to two equivalent O(5) and two equivalent O(6) atoms to form ZnO4 tetrahedra that share corners with two equivalent Zn(4)O6 octahedra, corners with two equivalent Zn(5)O6 octahedra, corners with four equivalent Zn(2)O6 octahedra, and corners with four equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-63°. Both Zn(3)-O(5) bond lengths are 2.01 Å. Both Zn(3)-O(6) bond lengths are 2.01 Å. In the fourth Zn site, Zn(4) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form ZnO6 octahedra that share corners with two equivalent Zn(3)O4 tetrahedra, corners with four equivalent Zn(1)O4 tetrahedra, edges with two equivalent Zn(2)O6 octahedra, edges with two equivalent Zn(5)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. Both Zn(4)-O(1) bond lengths are 2.03 Å. Both Zn(4)-O(3) bond lengths are 2.22 Å. Both Zn(4)-O(5) bond lengths are 2.24 Å. In the fifth Zn site, Zn(5) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(6) atoms to form ZnO6 octahedra that share corners with two equivalent Zn(3)O4 tetrahedra, corners with four equivalent Zn(1)O4 tetrahedra, edges with two equivalent Zn(2)O6 octahedra, edges with two equivalent Zn(4)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. Both Zn(5)-O(1) bond lengths are 2.06 Å. Both Zn(5)-O(3) bond lengths are 2.20 Å. Both Zn(5)-O(6) bond lengths are 2.16 Å. Sb(1) is bonded to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms to form SbO6 octahedra that share corners with two equivalent Zn(3)O4 tetrahedra, corners with four equivalent Zn(1)O4 tetrahedra,  an edgeedge with one Zn(4)O6 octahedra,  an edgeedge with one Zn(5)O6 octahedra,  an edgeedge with one Sb(1)O6 octahedra, and edges with three equivalent Zn(2)O6 octahedra. The Sb(1)-O(2) bond length is 2.01 Å. The Sb(1)-O(3) bond length is 1.99 Å. The Sb(1)-O(5) bond length is 1.99 Å. The Sb(1)-O(6) bond length is 2.00 Å. There is one shorter (2.09 Å) and one longer (2.10 Å) Sb(1)-O(4) bond length. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Zn(1), one Zn(2), one Zn(4), and one Zn(5) atom. In the second O site, O(2) is bonded to one Zn(1), two equivalent Zn(2), and one Sb(1) atom to form distorted edge-sharing OZn3Sb trigonal pyramids. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Zn(1), one Zn(4), one Zn(5), and one Sb(1) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Zn(1), one Zn(2), and two equivalent Sb(1) atoms. In the fifth O site, O(5) is bonded in a rectangular see-saw-like geometry to one Zn(2), one Zn(3), one Zn(4), and one Sb(1) atom. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Zn(2), one Zn(3), one Zn(5), and one Sb(1) atom.