FeZn2SbO6 crystallizes in the monoclinic P2_1/m space group. Fe(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form FeO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with four equivalent Sb(1)O6 octahedra, and corners with four equivalent Zn(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 40-44°. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a distorted rectangular see-saw-like geometry to one O(3), one O(4), and two equivalent O(1) atoms. In the second Zn site, Zn(2) is bonded to one O(3), one O(4), and two equivalent O(2) atoms to form distorted ZnO4 tetrahedra that share corners with four equivalent Fe(1)O6 octahedra and corners with four equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 66-84°. Sb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form SbO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra, corners with four equivalent Fe(1)O6 octahedra, and corners with four equivalent Zn(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 44-46°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Fe(1), one Zn(1), and one Sb(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Fe(1), one Zn(2), and one Sb(1) atom. In the third O site, O(3) is bonded to one Zn(1), one Zn(2), and two equivalent Sb(1) atoms to form OZn2Sb2 tetrahedra that share corners with two equivalent O(3)Zn2Sb2 tetrahedra and corners with two equivalent O(4)Zn2Fe2 trigonal pyramids. In the fourth O site, O(4) is bonded to two equivalent Fe(1), one Zn(1), and one Zn(2) atom to form distorted OZn2Fe2 trigonal pyramids that share corners with two equivalent O(3)Zn2Sb2 tetrahedra and corners with two equivalent O(4)Zn2Fe2 trigonal pyramids.
FeZn2SbO6 crystallizes in the monoclinic P2_1/m space group. Fe(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form FeO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with four equivalent Sb(1)O6 octahedra, and corners with four equivalent Zn(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 40-44°. Both Fe(1)-O(1) bond lengths are 2.03 Å. Both Fe(1)-O(2) bond lengths are 2.07 Å. Both Fe(1)-O(4) bond lengths are 2.06 Å. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a distorted rectangular see-saw-like geometry to one O(3), one O(4), and two equivalent O(1) atoms. The Zn(1)-O(3) bond length is 2.15 Å. The Zn(1)-O(4) bond length is 2.08 Å. Both Zn(1)-O(1) bond lengths are 2.08 Å. In the second Zn site, Zn(2) is bonded to one O(3), one O(4), and two equivalent O(2) atoms to form distorted ZnO4 tetrahedra that share corners with four equivalent Fe(1)O6 octahedra and corners with four equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 66-84°. The Zn(2)-O(3) bond length is 2.23 Å. The Zn(2)-O(4) bond length is 1.99 Å. Both Zn(2)-O(2) bond lengths are 2.04 Å. Sb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form SbO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra, corners with four equivalent Fe(1)O6 octahedra, and corners with four equivalent Zn(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 44-46°. Both Sb(1)-O(1) bond lengths are 1.99 Å. Both Sb(1)-O(2) bond lengths are 1.99 Å. Both Sb(1)-O(3) bond lengths are 2.10 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Fe(1), one Zn(1), and one Sb(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Fe(1), one Zn(2), and one Sb(1) atom. In the third O site, O(3) is bonded to one Zn(1), one Zn(2), and two equivalent Sb(1) atoms to form OZn2Sb2 tetrahedra that share corners with two equivalent O(3)Zn2Sb2 tetrahedra and corners with two equivalent O(4)Zn2Fe2 trigonal pyramids. In the fourth O site, O(4) is bonded to two equivalent Fe(1), one Zn(1), and one Zn(2) atom to form distorted OZn2Fe2 trigonal pyramids that share corners with two equivalent O(3)Zn2Sb2 tetrahedra and corners with two equivalent O(4)Zn2Fe2 trigonal pyramids.