SiO2 is Anatase-like structured and crystallizes in the tetragonal P4_32_12 space group. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form distorted corner-sharing SiO4 tetrahedra. In the second Si site, Si(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted corner-sharing SiO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Si(1) and one Si(2) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Si(1) and one Si(2) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to two equivalent Si(1) atoms.
SiO2 is Anatase-like structured and crystallizes in the tetragonal P4_32_12 space group. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form distorted corner-sharing SiO4 tetrahedra. The Si(1)-O(1) bond length is 1.64 Å. The Si(1)-O(2) bond length is 1.63 Å. Both Si(1)-O(3) bond lengths are 1.64 Å. In the second Si site, Si(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted corner-sharing SiO4 tetrahedra. Both Si(2)-O(1) bond lengths are 1.64 Å. Both Si(2)-O(2) bond lengths are 1.64 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Si(1) and one Si(2) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Si(1) and one Si(2) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to two equivalent Si(1) atoms.