TbRhSi crystallizes in the orthorhombic Cmcm space group. Tb(1) is bonded in a 11-coordinate geometry to five equivalent Rh(1) and six equivalent Si(1) atoms. Rh(1) is bonded in a 9-coordinate geometry to five equivalent Tb(1) and four equivalent Si(1) atoms. Si(1) is bonded to six equivalent Tb(1), four equivalent Rh(1), and two equivalent Si(1) atoms to form a mixture of distorted edge, face, and corner-sharing SiTb6Si2Rh4 cuboctahedra.
TbRhSi crystallizes in the orthorhombic Cmcm space group. Tb(1) is bonded in a 11-coordinate geometry to five equivalent Rh(1) and six equivalent Si(1) atoms. There are a spread of Tb(1)-Rh(1) bond distances ranging from 2.88-3.01 Å. There are two shorter (3.16 Å) and four longer (3.27 Å) Tb(1)-Si(1) bond lengths. Rh(1) is bonded in a 9-coordinate geometry to five equivalent Tb(1) and four equivalent Si(1) atoms. All Rh(1)-Si(1) bond lengths are 2.58 Å. Si(1) is bonded to six equivalent Tb(1), four equivalent Rh(1), and two equivalent Si(1) atoms to form a mixture of distorted edge, face, and corner-sharing SiTb6Si2Rh4 cuboctahedra. Both Si(1)-Si(1) bond lengths are 2.59 Å.