Tm5Ge3C 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 Ge(1) atoms. In the second Tm site, Tm(2) is bonded in a 2-coordinate geometry to five equivalent Ge(1) and two equivalent C(1) atoms. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Tm(1) and five equivalent Tm(2) atoms. C(1) is bonded to six equivalent Tm(2) atoms to form face-sharing CTm6 octahedra.
Tm5Ge3C 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 Ge(1) atoms. All Tm(1)-Ge(1) bond lengths are 3.01 Å. In the second Tm site, Tm(2) is bonded in a 2-coordinate geometry to five equivalent Ge(1) and two equivalent C(1) atoms. There are a spread of Tm(2)-Ge(1) bond distances ranging from 2.95-3.50 Å. Both Tm(2)-C(1) bond lengths are 2.44 Å. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Tm(1) and five equivalent Tm(2) atoms. C(1) is bonded to six equivalent Tm(2) atoms to form face-sharing CTm6 octahedra.