Cr3(TeSe)2 crystallizes in the monoclinic C2/m space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to four equivalent Te(1) and two equivalent Se(1) atoms to form CrTe4Se2 octahedra that share corners with twelve equivalent Cr(2)Te3Se3 octahedra, edges with two equivalent Cr(1)Te4Se2 octahedra, and faces with two equivalent Cr(2)Te3Se3 octahedra. The corner-sharing octahedral tilt angles range from 49-53°. In the second Cr site, Cr(2) is bonded to three equivalent Te(1) and three equivalent Se(1) atoms to form distorted CrTe3Se3 octahedra that share corners with six equivalent Cr(1)Te4Se2 octahedra, edges with six equivalent Cr(2)Te3Se3 octahedra, and  a faceface with one Cr(1)Te4Se2 octahedra. The corner-sharing octahedral tilt angles range from 49-53°. Te(1) is bonded to two equivalent Cr(1) and three equivalent Cr(2) atoms to form distorted TeCr5 trigonal bipyramids that share corners with two equivalent Te(1)Cr5 trigonal bipyramids, corners with seven equivalent Se(1)Cr4 trigonal pyramids, edges with five equivalent Te(1)Cr5 trigonal bipyramids, and edges with three equivalent Se(1)Cr4 trigonal pyramids. Se(1) is bonded to one Cr(1) and three equivalent Cr(2) atoms to form SeCr4 trigonal pyramids that share corners with seven equivalent Te(1)Cr5 trigonal bipyramids, corners with three equivalent Se(1)Cr4 trigonal pyramids, edges with three equivalent Te(1)Cr5 trigonal bipyramids, and edges with two equivalent Se(1)Cr4 trigonal pyramids.
Cr3(TeSe)2 crystallizes in the monoclinic C2/m space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to four equivalent Te(1) and two equivalent Se(1) atoms to form CrTe4Se2 octahedra that share corners with twelve equivalent Cr(2)Te3Se3 octahedra, edges with two equivalent Cr(1)Te4Se2 octahedra, and faces with two equivalent Cr(2)Te3Se3 octahedra. The corner-sharing octahedral tilt angles range from 49-53°. All Cr(1)-Te(1) bond lengths are 2.80 Å. Both Cr(1)-Se(1) bond lengths are 2.59 Å. In the second Cr site, Cr(2) is bonded to three equivalent Te(1) and three equivalent Se(1) atoms to form distorted CrTe3Se3 octahedra that share corners with six equivalent Cr(1)Te4Se2 octahedra, edges with six equivalent Cr(2)Te3Se3 octahedra, and  a faceface with one Cr(1)Te4Se2 octahedra. The corner-sharing octahedral tilt angles range from 49-53°. There is one shorter (2.81 Å) and two longer (2.84 Å) Cr(2)-Te(1) bond lengths. There is one shorter (2.53 Å) and two longer (2.54 Å) Cr(2)-Se(1) bond lengths. Te(1) is bonded to two equivalent Cr(1) and three equivalent Cr(2) atoms to form distorted TeCr5 trigonal bipyramids that share corners with two equivalent Te(1)Cr5 trigonal bipyramids, corners with seven equivalent Se(1)Cr4 trigonal pyramids, edges with five equivalent Te(1)Cr5 trigonal bipyramids, and edges with three equivalent Se(1)Cr4 trigonal pyramids. Se(1) is bonded to one Cr(1) and three equivalent Cr(2) atoms to form SeCr4 trigonal pyramids that share corners with seven equivalent Te(1)Cr5 trigonal bipyramids, corners with three equivalent Se(1)Cr4 trigonal pyramids, edges with three equivalent Te(1)Cr5 trigonal bipyramids, and edges with two equivalent Se(1)Cr4 trigonal pyramids.