Mg2Tl is zeta silver zinc structured and crystallizes in the hexagonal P-62m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Tl(1) and two equivalent Tl(2) atoms to form a mixture of distorted edge and corner-sharing MgTl4 tetrahedra. In the second Mg site, Mg(2) is bonded in a 5-coordinate geometry to one Tl(2) and four equivalent Tl(1) atoms. There are two inequivalent Tl sites. In the first Tl site, Tl(1) is bonded in a 9-coordinate geometry to three equivalent Mg(1) and six equivalent Mg(2) atoms. In the second Tl site, Tl(2) is bonded in a 9-coordinate geometry to three equivalent Mg(2) and six equivalent Mg(1) atoms.
Mg2Tl is zeta silver zinc structured and crystallizes in the hexagonal P-62m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Tl(1) and two equivalent Tl(2) atoms to form a mixture of distorted edge and corner-sharing MgTl4 tetrahedra. Both Mg(1)-Tl(1) bond lengths are 2.93 Å. Both Mg(1)-Tl(2) bond lengths are 2.91 Å. In the second Mg site, Mg(2) is bonded in a 5-coordinate geometry to one Tl(2) and four equivalent Tl(1) atoms. The Mg(2)-Tl(2) bond length is 3.05 Å. All Mg(2)-Tl(1) bond lengths are 3.13 Å. There are two inequivalent Tl sites. In the first Tl site, Tl(1) is bonded in a 9-coordinate geometry to three equivalent Mg(1) and six equivalent Mg(2) atoms. In the second Tl site, Tl(2) is bonded in a 9-coordinate geometry to three equivalent Mg(2) and six equivalent Mg(1) atoms.