SiO2 crystallizes in the trigonal R-3c space group. Si(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted corner-sharing SiO4 trigonal pyramids. There are two 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(2) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms.
SiO2 crystallizes in the trigonal R-3c space group. Si(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted corner-sharing SiO4 trigonal pyramids. Both Si(1)-O(1) bond lengths are 1.62 Å. Both Si(1)-O(2) bond lengths are 1.66 Å. There are two 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(2) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms.