Materials Data on SiO2 by Materials Project
SiO2 is Rutile structured and crystallizes in the tetragonal P4_2/mnm space group. The structure is three-dimensional. Si4+ is bonded to six equivalent O2- atoms to form a mixture of corner and edge-sharing SiO6 octahedra. The corner-sharing octahedral tilt angles are 49°. There is four shorter (1.78 Å) and two longer (1.84 Å) Si–O bond length. O2- is bonded in a distorted trigonal planar geometry to three equivalent Si4+ atoms.