TbSi2 is hexagonal omega structure-like structured and crystallizes in the tetragonal I4_1/amd space group. Tb(1) is bonded to twelve equivalent Si(1) atoms to form a mixture of face and edge-sharing TbSi12 cuboctahedra. Si(1) is bonded in a 9-coordinate geometry to six equivalent Tb(1) and three equivalent Si(1) atoms.
TbSi2 is hexagonal omega structure-like structured and crystallizes in the tetragonal I4_1/amd space group. Tb(1) is bonded to twelve equivalent Si(1) atoms to form a mixture of face and edge-sharing TbSi12 cuboctahedra. There are eight shorter (3.06 Å) and four longer (3.14 Å) Tb(1)-Si(1) bond lengths. Si(1) is bonded in a 9-coordinate geometry to six equivalent Tb(1) and three equivalent Si(1) atoms. There are two shorter (2.34 Å) and one longer (2.39 Å) Si(1)-Si(1) bond length.