Tm(IrB)4 crystallizes in the tetragonal P4_2/nmc space group. Tm(1) is bonded in a 24-coordinate geometry to twelve equivalent Ir(1) and twelve equivalent B(1) atoms. Ir(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 Ir(1), and one B(1) atom.
Tm(IrB)4 crystallizes in the tetragonal P4_2/nmc space group. Tm(1) is bonded in a 24-coordinate geometry to twelve equivalent Ir(1) and twelve equivalent B(1) atoms. There are four shorter (2.95 Å) and eight longer (3.19 Å) Tm(1)-Ir(1) bond lengths. There are eight shorter (3.06 Å) and four longer (3.11 Å) Tm(1)-B(1) bond lengths. Ir(1) is bonded in a 5-coordinate geometry to three equivalent Tm(1) and five equivalent B(1) atoms. There are a spread of Ir(1)-B(1) bond distances ranging from 2.21-2.25 Å. B(1) is bonded in a 6-coordinate geometry to three equivalent Tm(1), five equivalent Ir(1), and one B(1) atom. The B(1)-B(1) bond length is 1.86 Å.