Tm2Au2Sn crystallizes in the tetragonal P4_2/mnm space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded in a 6-coordinate geometry to six equivalent Au(1) and four equivalent Sn(1) atoms. In the second Tm site, Tm(2) is bonded in a 6-coordinate geometry to six equivalent Au(1) and four equivalent Sn(1) atoms. Au(1) is bonded in a 9-coordinate geometry to three equivalent Tm(1), three equivalent Tm(2), one Au(1), and two equivalent Sn(1) atoms. Sn(1) is bonded to four equivalent Tm(1), four equivalent Tm(2), and four equivalent Au(1) atoms to form a mixture of corner and face-sharing SnTm8Au4 cuboctahedra.
Tm2Au2Sn crystallizes in the tetragonal P4_2/mnm space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded in a 6-coordinate geometry to six equivalent Au(1) and four equivalent Sn(1) atoms. There are two shorter (2.94 Å) and four longer (2.99 Å) Tm(1)-Au(1) bond lengths. All Tm(1)-Sn(1) bond lengths are 3.44 Å. In the second Tm site, Tm(2) is bonded in a 6-coordinate geometry to six equivalent Au(1) and four equivalent Sn(1) atoms. There are two shorter (2.91 Å) and four longer (3.04 Å) Tm(2)-Au(1) bond lengths. All Tm(2)-Sn(1) bond lengths are 3.49 Å. Au(1) is bonded in a 9-coordinate geometry to three equivalent Tm(1), three equivalent Tm(2), one Au(1), and two equivalent Sn(1) atoms. The Au(1)-Au(1) bond length is 2.84 Å. Both Au(1)-Sn(1) bond lengths are 3.09 Å. Sn(1) is bonded to four equivalent Tm(1), four equivalent Tm(2), and four equivalent Au(1) atoms to form a mixture of corner and face-sharing SnTm8Au4 cuboctahedra.