ThSi2 is hexagonal omega structure structured and crystallizes in the hexagonal P6/mmm 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 structured and crystallizes in the hexagonal P6/mmm 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. All Si(1)-Si(1) bond lengths are 2.37 Å.