Tb3Ir is Cementite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 3-coordinate geometry to three equivalent Ir(1) atoms. In the second Tb site, Tb(2) is bonded in a distorted bent 150 degrees geometry to two equivalent Ir(1) atoms. Ir(1) is bonded in a 8-coordinate geometry to two equivalent Tb(2) and six equivalent Tb(1) atoms.
Tb3Ir is Cementite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 3-coordinate geometry to three equivalent Ir(1) atoms. There are a spread of Tb(1)-Ir(1) bond distances ranging from 2.85-3.29 Å. In the second Tb site, Tb(2) is bonded in a distorted bent 150 degrees geometry to two equivalent Ir(1) atoms. There is one shorter (2.75 Å) and one longer (2.86 Å) Tb(2)-Ir(1) bond length. Ir(1) is bonded in a 8-coordinate geometry to two equivalent Tb(2) and six equivalent Tb(1) atoms.