The material structure described by SiO2 crystallizes in the tetragonal P-4n2 space group. Si(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form corner-sharing SiO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent Si(1) atoms. In the second O site, O(2) is bonded in a bent 120 degrees geometry to two equivalent Si(1) atoms. In the third O site, O(3) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_SiO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.033
_cell_length_b   6.858
_cell_length_c   6.858
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   330.740
_cell_formula_units_Z   8
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Si  Si0  1  0.949  0.451  0.794  1.0
  Si  Si1  1  0.551  0.294  0.951  1.0
  Si  Si2  1  0.551  0.706  0.049  1.0
  Si  Si3  1  0.051  0.794  0.549  1.0
  Si  Si4  1  0.949  0.549  0.206  1.0
  Si  Si5  1  0.449  0.049  0.294  1.0
  Si  Si6  1  0.449  0.951  0.706  1.0
  Si  Si7  1  0.051  0.206  0.451  1.0
  O  O8  1  0.583  0.818  0.843  1.0
  O  O9  1  0.083  0.318  0.657  1.0
  O  O10  1  0.083  0.682  0.343  1.0
  O  O11  1  0.050  0.500  0.000  1.0
  O  O12  1  0.750  0.339  0.839  1.0
  O  O13  1  0.950  0.000  0.500  1.0
  O  O14  1  0.917  0.343  0.318  1.0
  O  O15  1  0.917  0.657  0.682  1.0
  O  O16  1  0.450  0.500  0.000  1.0
  O  O17  1  0.583  0.182  0.157  1.0
  O  O18  1  0.550  0.000  0.500  1.0
  O  O19  1  0.417  0.157  0.818  1.0
  O  O20  1  0.417  0.843  0.182  1.0
  O  O21  1  0.250  0.161  0.339  1.0
  O  O22  1  0.250  0.839  0.661  1.0
  O  O23  1  0.750  0.661  0.161  1.0
[/CIF]
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The material structure described by SiO2 crystallizes in the tetragonal P-4n2 space group. Si(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form corner-sharing SiO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent Si(1) atoms. In the second O site, O(2) is bonded in a bent 120 degrees geometry to two equivalent Si(1) atoms. In the third O site, O(3) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_SiO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.033
_cell_length_b   6.858
_cell_length_c   6.858
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   330.740
_cell_formula_units_Z   8
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Si  Si0  1  0.949  0.451  0.794  1.0
  Si  Si1  1  0.551  0.294  0.951  1.0
  Si  Si2  1  0.551  0.706  0.049  1.0
  Si  Si3  1  0.051  0.794  0.549  1.0
  Si  Si4  1  0.949  0.549  0.206  1.0
  Si  Si5  1  0.449  0.049  0.294  1.0
  Si  Si6  1  0.449  0.951  0.706  1.0
  Si  Si7  1  0.051  0.206  0.451  1.0
  O  O8  1  0.583  0.818  0.843  1.0
  O  O9  1  0.083  0.318  0.657  1.0
  O  O10  1  0.083  0.682  0.343  1.0
  O  O11  1  0.050  0.500  0.000  1.0
  O  O12  1  0.750  0.339  0.839  1.0
  O  O13  1  0.950  0.000  0.500  1.0
  O  O14  1  0.917  0.343  0.318  1.0
  O  O15  1  0.917  0.657  0.682  1.0
  O  O16  1  0.450  0.500  0.000  1.0
  O  O17  1  0.583  0.182  0.157  1.0
  O  O18  1  0.550  0.000  0.500  1.0
  O  O19  1  0.417  0.157  0.818  1.0
  O  O20  1  0.417  0.843  0.182  1.0
  O  O21  1  0.250  0.161  0.339  1.0
  O  O22  1  0.250  0.839  0.661  1.0
  O  O23  1  0.750  0.661  0.161  1.0
[/CIF]
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