data_SiO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.79
_cell_length_b   6.79
_cell_length_c   9.19
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   102.34
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiO2
_chemical_formula_sum   'Si8 O16'
_cell_volume   413.87
_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  Si16  1  0.62  0.32  0.83  1.0
  Si  Si17  1  0.89  0.68  0.42  1.0
  Si  Si18  1  0.62  0.68  0.37  1.0
  Si  Si19  1  0.89  0.32  0.77  1.0
  Si  Si20  1  0.89  0.68  0.37  1.0
  Si  Si21  1  0.62  0.32  0.77  1.0
  Si  Si22  1  0.89  0.32  0.83  1.0
  Si  Si23  1  0.62  0.68  0.42  1.0
  O  O0  1  0.18  0.0  0.6  1.0
  O  O1  1  0.34  0.0  0.0  1.0
  O  O2  1  0.34  0.0  0.6  1.0
  O  O3  1  0.18  0.0  0.0  1.0
  O  O4  1  0.13  0.64  0.6  1.0
  O  O5  1  0.13  0.64  0.0  1.0
  O  O6  1  0.13  0.36  0.6  1.0
  O  O7  1  0.13  0.36  0.0  1.0
  O  O8  1  0.26  0.98  0.38  1.0
  O  O9  1  0.26  0.02  0.79  1.0
  O  O10  1  0.26  0.02  0.81  1.0
  O  O11  1  0.26  0.98  0.41  1.0
  O  O12  1  0.33  0.67  0.89  1.0
  O  O13  1  0.18  0.33  0.3  1.0
  O  O14  1  0.33  0.33  0.3  1.0
  O  O15  1  0.18  0.67  0.89  1.0

data_SiO2
_symmetry_space_group_name_H-M   P1
_cell_length_a   6.79
_cell_length_b   6.79
_cell_length_c   9.19
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   102.34
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiO2
_chemical_formula_sum   'Si8 O16'
_cell_volume   413.87
_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  0.62  0.32  0.77  1.0
  Si  Si1  1  0.62  0.32  0.83  1.0
  Si  Si2  1  0.62  0.68  0.37  1.0
  Si  Si3  1  0.62  0.68  0.42  1.0
  Si  Si4  1  0.89  0.32  0.77  1.0
  Si  Si5  1  0.89  0.32  0.83  1.0
  Si  Si6  1  0.89  0.68  0.37  1.0
  Si  Si7  1  0.89  0.68  0.42  1.0
  O  O8  1  0.13  0.36  -0.0  1.0
  O  O9  1  0.13  0.36  0.6  1.0
  O  O10  1  0.13  0.64  -0.0  1.0
  O  O11  1  0.13  0.64  0.6  1.0
  O  O12  1  0.18  0.0  -0.0  1.0
  O  O13  1  0.18  0.0  0.6  1.0
  O  O14  1  0.18  0.33  0.3  1.0
  O  O15  1  0.18  0.67  0.89  1.0
  O  O16  1  0.26  0.02  0.79  1.0
  O  O17  1  0.26  0.02  0.81  1.0
  O  O18  1  0.26  0.98  0.38  1.0
  O  O19  1  0.26  0.98  0.41  1.0
  O  O20  1  0.33  0.33  0.3  1.0
  O  O21  1  0.33  0.67  0.89  1.0
  O  O22  1  0.34  0.0  -0.0  1.0
  O  O23  1  0.34  0.0  0.6  1.0

Si Si Si Si Si Si Si Si O O O O O O O O O O O O O O O O
SiO2 crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of five 7782-44-7 molecules, two disilane molecules, one trioxidane molecule, one SiO cluster, and one SiOSi cluster. In the SiO cluster, there are two inequivalent Si sites. In the first Si site, Si(4) is bonded in a 2-coordinate geometry to one Si(7) and one O(7) atom. The Si(4)-Si(7) bond length is 0.52 Å. The Si(4)-O(7) bond length is 2.22 Å. In the second Si site, Si(7) is bonded in a 2-coordinate geometry to one Si(4) and one O(8) atom. The Si(7)-O(8) bond length is 2.22 Å. There are two inequivalent O sites. In the first O site, O(8) is bonded in a distorted single-bond geometry to one Si(7) atom. In the second O site, O(7) is bonded in a distorted single-bond geometry to one Si(4) atom. In the SiOSi cluster, there are two inequivalent Si sites. In the first Si site, Si(2) is bonded in a 2-coordinate geometry to one Si(5) and one O(5) atom. The Si(2)-Si(5) bond length is 0.52 Å. The Si(2)-O(5) bond length is 2.29 Å. In the second Si site, Si(5) is bonded in a single-bond geometry to one Si(2) atom. O(5) is bonded in a distorted single-bond geometry to one Si(2) atom.