Tm5NiPb3 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 7-coordinate geometry to two equivalent Ni(1) and five equivalent Pb(1) atoms. In the second Tm site, Tm(2) is bonded in a 6-coordinate geometry to six equivalent Pb(1) atoms. Ni(1) is bonded to six equivalent Tm(1) atoms to form face-sharing NiTm6 octahedra. Pb(1) is bonded in a 9-coordinate geometry to four equivalent Tm(2) and five equivalent Tm(1) atoms.
Tm5NiPb3 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 7-coordinate geometry to two equivalent Ni(1) and five equivalent Pb(1) atoms. Both Tm(1)-Ni(1) bond lengths are 2.68 Å. There are a spread of Tm(1)-Pb(1) bond distances ranging from 3.12-3.62 Å. In the second Tm site, Tm(2) is bonded in a 6-coordinate geometry to six equivalent Pb(1) atoms. All Tm(2)-Pb(1) bond lengths are 3.20 Å. Ni(1) is bonded to six equivalent Tm(1) atoms to form face-sharing NiTm6 octahedra. Pb(1) is bonded in a 9-coordinate geometry to four equivalent Tm(2) and five equivalent Tm(1) atoms.