Cr3FeZn2O8 is Spinel-derived structured and crystallizes in the trigonal R-3m space group. Cr(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CrO6 octahedra that share corners with six equivalent Zn(1)O4 tetrahedra, edges with two equivalent Fe(1)O6 octahedra, and edges with four equivalent Cr(1)O6 octahedra. Fe(1) is bonded to six equivalent O(2) atoms to form FeO6 octahedra that share corners with six equivalent Zn(1)O4 tetrahedra and edges with six equivalent Cr(1)O6 octahedra. Zn(1) is bonded to one O(1) and three equivalent O(2) atoms to form ZnO4 tetrahedra that share corners with three equivalent Fe(1)O6 octahedra and corners with nine equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-59°. There are two inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Cr(1) and one Zn(1) atom to form distorted OZnCr3 trigonal pyramids that share corners with three equivalent O(1)ZnCr3 trigonal pyramids, corners with nine equivalent O(2)ZnCr2Fe trigonal pyramids, and edges with three equivalent O(2)ZnCr2Fe trigonal pyramids. In the second O site, O(2) is bonded to two equivalent Cr(1), one Fe(1), and one Zn(1) atom to form distorted OZnCr2Fe trigonal pyramids that share corners with three equivalent O(1)ZnCr3 trigonal pyramids, corners with nine equivalent O(2)ZnCr2Fe trigonal pyramids,  an edgeedge with one O(1)ZnCr3 trigonal pyramid, and edges with two equivalent O(2)ZnCr2Fe trigonal pyramids.
Cr3FeZn2O8 is Spinel-derived structured and crystallizes in the trigonal R-3m space group. Cr(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CrO6 octahedra that share corners with six equivalent Zn(1)O4 tetrahedra, edges with two equivalent Fe(1)O6 octahedra, and edges with four equivalent Cr(1)O6 octahedra. Both Cr(1)-O(1) bond lengths are 2.03 Å. All Cr(1)-O(2) bond lengths are 2.03 Å. Fe(1) is bonded to six equivalent O(2) atoms to form FeO6 octahedra that share corners with six equivalent Zn(1)O4 tetrahedra and edges with six equivalent Cr(1)O6 octahedra. All Fe(1)-O(2) bond lengths are 2.05 Å. Zn(1) is bonded to one O(1) and three equivalent O(2) atoms to form ZnO4 tetrahedra that share corners with three equivalent Fe(1)O6 octahedra and corners with nine equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-59°. The Zn(1)-O(1) bond length is 2.02 Å. All Zn(1)-O(2) bond lengths are 2.01 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Cr(1) and one Zn(1) atom to form distorted OZnCr3 trigonal pyramids that share corners with three equivalent O(1)ZnCr3 trigonal pyramids, corners with nine equivalent O(2)ZnCr2Fe trigonal pyramids, and edges with three equivalent O(2)ZnCr2Fe trigonal pyramids. In the second O site, O(2) is bonded to two equivalent Cr(1), one Fe(1), and one Zn(1) atom to form distorted OZnCr2Fe trigonal pyramids that share corners with three equivalent O(1)ZnCr3 trigonal pyramids, corners with nine equivalent O(2)ZnCr2Fe trigonal pyramids,  an edgeedge with one O(1)ZnCr3 trigonal pyramid, and edges with two equivalent O(2)ZnCr2Fe trigonal pyramids.