Tl9CeTe6 crystallizes in the tetragonal I4/m space group. Ce(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form CeTe6 octahedra that share corners with six equivalent Tl(1)Te6 octahedra. The corner-sharing octahedral tilt angles range from 0-38°. There are two inequivalent Tl sites. In the first Tl site, Tl(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form distorted TlTe6 octahedra that share corners with six equivalent Ce(1)Te6 octahedra. The corner-sharing octahedral tilt angles range from 0-38°. In the second Tl site, Tl(2) is bonded in a distorted single-bond geometry to one Te(2) atom. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a single-bond geometry to one Ce(1) and one Tl(1) atom. In the second Te site, Te(2) is bonded in a 3-coordinate geometry to one Ce(1), one Tl(1), and two equivalent Tl(2) atoms.
Tl9CeTe6 crystallizes in the tetragonal I4/m space group. Ce(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form CeTe6 octahedra that share corners with six equivalent Tl(1)Te6 octahedra. The corner-sharing octahedral tilt angles range from 0-38°. Both Ce(1)-Te(1) bond lengths are 3.24 Å. All Ce(1)-Te(2) bond lengths are 3.25 Å. There are two inequivalent Tl sites. In the first Tl site, Tl(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form distorted TlTe6 octahedra that share corners with six equivalent Ce(1)Te6 octahedra. The corner-sharing octahedral tilt angles range from 0-38°. Both Tl(1)-Te(1) bond lengths are 3.59 Å. All Tl(1)-Te(2) bond lengths are 3.54 Å. In the second Tl site, Tl(2) is bonded in a distorted single-bond geometry to one Te(2) atom. The Tl(2)-Te(2) bond length is 3.25 Å. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a single-bond geometry to one Ce(1) and one Tl(1) atom. In the second Te site, Te(2) is bonded in a 3-coordinate geometry to one Ce(1), one Tl(1), and two equivalent Tl(2) atoms.