Tm5Pt2Bi crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded to four equivalent Pt(1) and two equivalent Bi(1) atoms to form distorted corner-sharing TmBi2Pt4 octahedra. The corner-sharing octahedral tilt angles range from 0-47°. In the second Tm site, Tm(2) is bonded in a 5-coordinate geometry to three equivalent Pt(1) and two equivalent Bi(1) atoms. Pt(1) is bonded in a 8-coordinate geometry to two equivalent Tm(1) and six equivalent Tm(2) atoms. Bi(1) is bonded in a 10-coordinate geometry to two equivalent Tm(1) and eight equivalent Tm(2) atoms.
Tm5Pt2Bi crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded to four equivalent Pt(1) and two equivalent Bi(1) atoms to form distorted corner-sharing TmBi2Pt4 octahedra. The corner-sharing octahedral tilt angles range from 0-47°. All Tm(1)-Pt(1) bond lengths are 2.95 Å. Both Tm(1)-Bi(1) bond lengths are 3.40 Å. In the second Tm site, Tm(2) is bonded in a 5-coordinate geometry to three equivalent Pt(1) and two equivalent Bi(1) atoms. There is one shorter (2.88 Å) and two longer (2.92 Å) Tm(2)-Pt(1) bond lengths. Both Tm(2)-Bi(1) bond lengths are 3.28 Å. Pt(1) is bonded in a 8-coordinate geometry to two equivalent Tm(1) and six equivalent Tm(2) atoms. Bi(1) is bonded in a 10-coordinate geometry to two equivalent Tm(1) and eight equivalent Tm(2) atoms.