Tl3AsSe3 crystallizes in the trigonal R3m space group. Tl(1) is bonded in a 3-coordinate geometry to three equivalent Se(1) atoms. As(1) is bonded in a trigonal non-coplanar geometry to three equivalent Se(1) atoms. Se(1) is bonded in a distorted square co-planar geometry to three equivalent Tl(1) and one As(1) atom.
Tl3AsSe3 crystallizes in the trigonal R3m space group. Tl(1) is bonded in a 3-coordinate geometry to three equivalent Se(1) atoms. All Tl(1)-Se(1) bond lengths are 3.18 Å. As(1) is bonded in a trigonal non-coplanar geometry to three equivalent Se(1) atoms. All As(1)-Se(1) bond lengths are 2.40 Å. Se(1) is bonded in a distorted square co-planar geometry to three equivalent Tl(1) and one As(1) atom.