mp-7000: SiO2 (trigonal, P3_121, 152) - Materials Project
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.
mp-988: Si3N4 (hexagonal, P6_3/m, 176) - Materials Project
Si3N4 crystallizes in the hexagonal P6_3/m space group. The structure is three-dimensional. Si4+ is bonded to four N3- atoms to form corner-sharing SiN4 tetrahedra. There is one shorter (1.74 Å) and three longer (1.75 Å) Si–N bond length. There are two inequivalent N3- sites.
mp-2245: Si3N4 (trigonal, P31c, 159) - Materials Project
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.
mp-66: C (cubic, Fd-3m, 227) - Materials Project
C is diamond structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. C is bonded to four equivalent C atoms to form corner-sharing CC4 tetrahedra. All C–C bond lengths are 1.55 Å.
Materials Project
V₃Si crystallizes in the cubic Pm̅3n space group. V is bonded in a 6-coordinate geometry to two equivalent V and four equivalent Si atoms. Both V-V bond lengths are 2.34 Å. All V-Si bond lengths are 2.62 Å. Si is bonded to twelve equivalent V atoms to form a mixture of face and edge-sharing SiV₁₂ cuboctahedra.
mp-1265: MgO (cubic, Fm-3m, 225) - Materials Project
MgO is Halite, Rock Salt structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Mg2+ is bonded to six equivalent O2- atoms to form a mixture of edge and corner-sharing MgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Mg–O bond lengths are 2.13 Å.
mp-8351: NaAlSiO4 (cubic, P2_13, 198) - Materials Project
NaAlSiO4 crystallizes in the cubic P2_13 space group. The structure is three-dimensional. Na1+ is bonded in a trigonal planar geometry to three equivalent O2- atoms. All Na–O bond lengths are 2.33 Å. Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share corners with four equivalent SiO4 tetrahedra.
Materials Project
SiC is Moissanite-4H structured and crystallizes in the hexagonal P6‚āÉmc space group. There are two inequivalent Si‚Āī‚Āļ sites. In the first Si‚Āī‚Āļ site, Si‚Āī‚Āļ is bonded to four C‚Āī‚ĀĽ atoms to form corner-sharing SiC‚āĄ tetrahedra. There are three shorter (1.88 √Ö) and one longer (1.89 √Ö) Si-C bond length. In the second Si‚Āī‚Āļ ...
mp-1367: Mg2Si (cubic, Fm-3m, 225) - Materials Project
Mg2Si is Fluorite structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Mg2+ is bonded to four equivalent Si4- atoms to form a mixture of edge and corner-sharing MgSi4 tetrahedra. All Mg–Si bond lengths are 2.76 Å. Si4- is bonded in a body-centered cubic geometry to eight equivalent Mg2+ atoms.
mp-8352: SiO2 (cubic, Fd-3m, 227) - Materials Project
SiO2 is high (beta) Cristobalite structured and crystallizes in the cubic Fd-3m 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 1.62 Å. O2- is bonded in a linear geometry to two equivalent Si4+ atoms.