Si is diamond structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Si is bonded to four equivalent Si atoms to form corner-sharing SiSi4 tetrahedra. All Si–Si bond lengths are 2.37 Å.

Si is diamond structured and crystallizes in the cubic Fd̅3m space group. Si is bonded to four equivalent Si atoms to form corner-sharing SiSi₄ tetrahedra. All Si-Si bond lengths are 2.36 Å.

Si crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. there are three inequivalent Si sites. In the first Si site, Si is bonded in a tetrahedral geometry to four equivalent Si atoms. All Si–Si bond lengths are 2.82 Å. In the second Si site, Si is bonded to four Si atoms to form corner-sharing SiSi4 tetrahedra.

Si is Copper structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Si is bonded to twelve equivalent Si atoms to form a mixture of face, edge, and corner-sharing SiSi12 cuboctahedra. All Si–Si bond lengths are 2.74 Å.

SiO2 is quartz (alpha) structured and crystallizes in the trigonal P3_121 space group. The structure is three-dimensional. Si4+ is bonded to four equivalent O2- atoms to form corner-sharing SiO4 tetrahedra. All Si–O bond lengths are 1.63 Å. O2- is bonded in a bent 150 degrees geometry to two equivalent Si4+ atoms.

Si is Clathrate structured and crystallizes in the cubic Pm-3n space group. The structure is three-dimensional. there are three inequivalent Si sites. In the first Si site, Si is bonded to four Si atoms to form corner-sharing SiSi4 tetrahedra.

SiC is Moissanite-6H structured and crystallizes in the hexagonal P6_3mc space group. The structure is three-dimensional. there are three inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four C4- atoms to form corner-sharing SiC4 tetrahedra. There is three shorter (1.89 Å) and one longer (1.90 Å) Si–C bond length.

The structure is two-dimensional and consists of two PSi sheets oriented in the (0, 0, 1) direction. there are six inequivalent Si4- sites. In the first Si4- site, Si4- is bonded to one Si4- and three P4+ atoms to form corner-sharing SiSiP3 tetrahedra.

Si3N4 crystallizes in the trigonal P31c space group. The structure is three-dimensional. there are two inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four N3- atoms to form corner-sharing SiN4 tetrahedra. There are a spread of Si–N bond distances ranging from 1.74–1.76 Å.

SiC is Moissanite-4H structured and crystallizes in the hexagonal P6_3mc space group. The structure is three-dimensional. there are two inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four C4- atoms to form corner-sharing SiC4 …