TmRh4B4 crystallizes in the tetragonal P4_2/nmc space group. Tm(1) is bonded in a 24-coordinate geometry to twelve equivalent Rh(1) and twelve equivalent B(1) atoms. Rh(1) is bonded in a 5-coordinate geometry to three equivalent Tm(1) and five equivalent B(1) atoms. B(1) is bonded in a 6-coordinate geometry to three equivalent Tm(1), five equivalent Rh(1), and one B(1) atom.
TmRh4B4 crystallizes in the tetragonal P4_2/nmc space group. Tm(1) is bonded in a 24-coordinate geometry to twelve equivalent Rh(1) and twelve equivalent B(1) atoms. There are four shorter (2.95 Å) and eight longer (3.17 Å) Tm(1)-Rh(1) bond lengths. There are eight shorter (3.02 Å) and four longer (3.16 Å) Tm(1)-B(1) bond lengths. Rh(1) is bonded in a 5-coordinate geometry to three equivalent Tm(1) and five equivalent B(1) atoms. There are two shorter (2.21 Å) and three longer (2.23 Å) Rh(1)-B(1) bond lengths. B(1) is bonded in a 6-coordinate geometry to three equivalent Tm(1), five equivalent Rh(1), and one B(1) atom. The B(1)-B(1) bond length is 1.79 Å.