Tl is alpha La structured and crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Tl sites. In the first Tl site, Tl(1) is bonded to six equivalent Tl(1) and six equivalent Tl(2) atoms to form a mixture of face, corner, and edge-sharing TlTl12 cuboctahedra. In the second Tl site, Tl(2) is bonded to six equivalent Tl(1) and six equivalent Tl(2) atoms to form a mixture of face, corner, and edge-sharing TlTl12 cuboctahedra.
Tl is alpha La structured and crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Tl sites. In the first Tl site, Tl(1) is bonded to six equivalent Tl(1) and six equivalent Tl(2) atoms to form a mixture of face, corner, and edge-sharing TlTl12 cuboctahedra. All Tl(1)-Tl(1) bond lengths are 3.51 Å. All Tl(1)-Tl(2) bond lengths are 3.47 Å. In the second Tl site, Tl(2) is bonded to six equivalent Tl(1) and six equivalent Tl(2) atoms to form a mixture of face, corner, and edge-sharing TlTl12 cuboctahedra. All Tl(2)-Tl(2) bond lengths are 3.51 Å.