SiO2 crystallizes in the tetragonal P-4c2 space group. Si(1) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form corner-sharing SiO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to two equivalent Si(1) atoms. In the second O site, O(3) is bonded in a linear geometry to two equivalent Si(1) atoms. In the third O site, O(2) is bonded in a bent 120 degrees geometry to two equivalent Si(1) atoms.
SiO2 crystallizes in the tetragonal P-4c2 space group. Si(1) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form corner-sharing SiO4 tetrahedra. The Si(1)-O(1) bond length is 1.64 Å. The Si(1)-O(3) bond length is 1.61 Å. Both Si(1)-O(2) bond lengths are 1.65 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to two equivalent Si(1) atoms. In the second O site, O(3) is bonded in a linear geometry to two equivalent Si(1) atoms. In the third O site, O(2) is bonded in a bent 120 degrees geometry to two equivalent Si(1) atoms.