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SnC is Zincblende, Sphalerite structured and crystallizes in the cubic F-43m space group. The structure is three-dimensional. Sn4+ is bonded to four equivalent C4- atoms to form corner-sharing SnC4 tetrahedra. All Sn–C bond lengths are 2.20 Å. C4- is bonded to four equivalent Sn4+ atoms to form corner-sharing CSn4 tetrahedra.
SnC is Halite, Rock Salt structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Sn4+ is bonded to six equivalent C4- atoms to form a mixture of edge and corner-sharing SnC6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Sn–C bond lengths are 2.40 Å. C4- is bonded to six equivalent Sn4+ atoms to form a mixture of edge and corner-sharing CSn6 octahedra. The corner-sharing octahedral tilt angles are 0°.