MgGdTl crystallizes in the hexagonal P-62m space group. Mg(1) is bonded in a 4-coordinate geometry to two equivalent Tl(1) and two equivalent Tl(2) atoms. Gd(1) 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(2) is bonded in a 9-coordinate geometry to six equivalent Mg(1) and three equivalent Gd(1) atoms. In the second Tl site, Tl(1) is bonded in a 9-coordinate geometry to three equivalent Mg(1) and six equivalent Gd(1) atoms.
MgGdTl crystallizes in the hexagonal P-62m space group. Mg(1) is bonded in a 4-coordinate geometry to two equivalent Tl(1) and two equivalent Tl(2) atoms. Both Mg(1)-Tl(1) bond lengths are 2.93 Å. Both Mg(1)-Tl(2) bond lengths are 2.97 Å. Gd(1) is bonded in a 5-coordinate geometry to one Tl(2) and four equivalent Tl(1) atoms. The Gd(1)-Tl(2) bond length is 3.25 Å. All Gd(1)-Tl(1) bond lengths are 3.24 Å. There are two inequivalent Tl sites. In the first Tl site, Tl(2) is bonded in a 9-coordinate geometry to six equivalent Mg(1) and three equivalent Gd(1) atoms. In the second Tl site, Tl(1) is bonded in a 9-coordinate geometry to three equivalent Mg(1) and six equivalent Gd(1) atoms.