Tm5In4 crystallizes in the hexagonal P6_3/mcm 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 In(2) atoms. In the second Tm site, Tm(2) is bonded in a 7-coordinate geometry to two equivalent In(1) and five equivalent In(2) atoms. There are two inequivalent In sites. In the first In site, In(1) is bonded to six equivalent Tm(2) atoms to form distorted face-sharing InTm6 octahedra. In the second In site, In(2) is bonded in a 9-coordinate geometry to four equivalent Tm(1) and five equivalent Tm(2) atoms.
Tm5In4 crystallizes in the hexagonal P6_3/mcm 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 In(2) atoms. All Tm(1)-In(2) bond lengths are 3.31 Å. In the second Tm site, Tm(2) is bonded in a 7-coordinate geometry to two equivalent In(1) and five equivalent In(2) atoms. Both Tm(2)-In(1) bond lengths are 3.10 Å. There are three shorter (3.09 Å) and two longer (3.36 Å) Tm(2)-In(2) bond lengths. There are two inequivalent In sites. In the first In site, In(1) is bonded to six equivalent Tm(2) atoms to form distorted face-sharing InTm6 octahedra. In the second In site, In(2) is bonded in a 9-coordinate geometry to four equivalent Tm(1) and five equivalent Tm(2) atoms.