ThSi2 is hexagonal omega structure-like structured and crystallizes in the tetragonal I4_1/amd space group. Th(1) is bonded to twelve equivalent Si(1) atoms to form a mixture of face and edge-sharing ThSi12 cuboctahedra. Si(1) is bonded in a 9-coordinate geometry to six equivalent Th(1) and three equivalent Si(1) atoms.
ThSi2 is hexagonal omega structure-like structured and crystallizes in the tetragonal I4_1/amd space group. Th(1) is bonded to twelve equivalent Si(1) atoms to form a mixture of face and edge-sharing ThSi12 cuboctahedra. All Th(1)-Si(1) bond lengths are 3.16 Å. Si(1) is bonded in a 9-coordinate geometry to six equivalent Th(1) and three equivalent Si(1) atoms. There are two shorter (2.39 Å) and one longer (2.40 Å) Si(1)-Si(1) bond length.