ErPdTl crystallizes in the hexagonal P-62m space group. Er(1) is bonded in a 11-coordinate geometry to one Pd(2), four equivalent Pd(1), and six equivalent Tl(1) atoms. There are two inequivalent Pd sites. In the first Pd site, Pd(2) is bonded in a 9-coordinate geometry to three equivalent Er(1) and six equivalent Tl(1) atoms. In the second Pd site, Pd(1) is bonded in a 9-coordinate geometry to six equivalent Er(1) and three equivalent Tl(1) atoms. Tl(1) is bonded in a 10-coordinate geometry to six equivalent Er(1), two equivalent Pd(1), and two equivalent Pd(2) atoms.
ErPdTl crystallizes in the hexagonal P-62m space group. Er(1) is bonded in a 11-coordinate geometry to one Pd(2), four equivalent Pd(1), and six equivalent Tl(1) atoms. The Er(1)-Pd(2) bond length is 3.11 Å. All Er(1)-Pd(1) bond lengths are 3.01 Å. There are two shorter (3.16 Å) and four longer (3.32 Å) Er(1)-Tl(1) bond lengths. There are two inequivalent Pd sites. In the first Pd site, Pd(2) is bonded in a 9-coordinate geometry to three equivalent Er(1) and six equivalent Tl(1) atoms. All Pd(2)-Tl(1) bond lengths are 2.80 Å. In the second Pd site, Pd(1) is bonded in a 9-coordinate geometry to six equivalent Er(1) and three equivalent Tl(1) atoms. All Pd(1)-Tl(1) bond lengths are 2.87 Å. Tl(1) is bonded in a 10-coordinate geometry to six equivalent Er(1), two equivalent Pd(1), and two equivalent Pd(2) atoms.