Cr2FeTlO10 crystallizes in the monoclinic C2/m space group. Cr(1) is bonded to one O(3), one O(4), and two equivalent O(2) atoms to form CrO4 tetrahedra that share corners with two equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles are 43°. Fe(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form FeO6 octahedra that share corners with four equivalent Cr(1)O4 tetrahedra. Tl(1) is bonded in a distorted linear geometry to two equivalent O(4) and four equivalent O(2) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Fe(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Cr(1), one Fe(1), and one Tl(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Cr(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Cr(1) and one Tl(1) atom.
Cr2FeTlO10 crystallizes in the monoclinic C2/m space group. Cr(1) is bonded to one O(3), one O(4), and two equivalent O(2) atoms to form CrO4 tetrahedra that share corners with two equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles are 43°. The Cr(1)-O(3) bond length is 1.62 Å. The Cr(1)-O(4) bond length is 1.65 Å. Both Cr(1)-O(2) bond lengths are 1.72 Å. Fe(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form FeO6 octahedra that share corners with four equivalent Cr(1)O4 tetrahedra. Both Fe(1)-O(1) bond lengths are 1.74 Å. All Fe(1)-O(2) bond lengths are 2.01 Å. Tl(1) is bonded in a distorted linear geometry to two equivalent O(4) and four equivalent O(2) atoms. Both Tl(1)-O(4) bond lengths are 2.53 Å. All Tl(1)-O(2) bond lengths are 2.80 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Fe(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Cr(1), one Fe(1), and one Tl(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Cr(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Cr(1) and one Tl(1) atom.