ThC2 is Pyrite structured and crystallizes in the cubic Pa-3 space group. Th(1) is bonded to six equivalent C(1) atoms to form ThC6 octahedra that share corners with twelve equivalent Th(1)C6 octahedra and corners with six equivalent C(1)Th3C tetrahedra. The corner-sharing octahedral tilt angles are 74°. C(1) is bonded to three equivalent Th(1) and one C(1) atom to form CTh3C tetrahedra that share corners with three equivalent Th(1)C6 octahedra and corners with fifteen equivalent C(1)Th3C tetrahedra. The corner-sharing octahedral tilt angles are 67°.
ThC2 is Pyrite structured and crystallizes in the cubic Pa-3 space group. Th(1) is bonded to six equivalent C(1) atoms to form ThC6 octahedra that share corners with twelve equivalent Th(1)C6 octahedra and corners with six equivalent C(1)Th3C tetrahedra. The corner-sharing octahedral tilt angles are 74°. All Th(1)-C(1) bond lengths are 2.57 Å. C(1) is bonded to three equivalent Th(1) and one C(1) atom to form CTh3C tetrahedra that share corners with three equivalent Th(1)C6 octahedra and corners with fifteen equivalent C(1)Th3C tetrahedra. The corner-sharing octahedral tilt angles are 67°. The C(1)-C(1) bond length is 1.35 Å.