SiO2 is Rutile-like structured and crystallizes in the monoclinic C2/c space group. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), two equivalent O(1), and three equivalent O(3) atoms to form a mixture of edge and corner-sharing SiO6 octahedra. The corner-sharing octahedral tilt angles range from 21-54°. In the second Si site, Si(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form a mixture of edge and corner-sharing SiO6 octahedra. The corner-sharing octahedral tilt angles range from 48-54°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Si(2) and two equivalent Si(1) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to one Si(1) and two equivalent Si(2) atoms. In the third O site, O(3) is bonded in a T-shaped geometry to three equivalent Si(1) atoms.
SiO2 is Rutile-like structured and crystallizes in the monoclinic C2/c space group. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), two equivalent O(1), and three equivalent O(3) atoms to form a mixture of edge and corner-sharing SiO6 octahedra. The corner-sharing octahedral tilt angles range from 21-54°. The Si(1)-O(2) bond length is 1.82 Å. There is one shorter (1.79 Å) and one longer (1.83 Å) Si(1)-O(1) bond length. There are a spread of Si(1)-O(3) bond distances ranging from 1.75-1.81 Å. In the second Si site, Si(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form a mixture of edge and corner-sharing SiO6 octahedra. The corner-sharing octahedral tilt angles range from 48-54°. Both Si(2)-O(1) bond lengths are 1.79 Å. There are two shorter (1.79 Å) and two longer (1.82 Å) Si(2)-O(2) bond lengths. There are three inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Si(2) and two equivalent Si(1) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to one Si(1) and two equivalent Si(2) atoms. In the third O site, O(3) is bonded in a T-shaped geometry to three equivalent Si(1) atoms.