The structure described by SiO2 crystallizes in the cubic Pa-3 space group. Si(1) is bonded to six equivalent O(1) atoms to form corner-sharing SiO6 octahedra. The corner-sharing octahedral tilt angles are 60°. O(1) is bonded in a trigonal planar geometry to three equivalent Si(1) atoms. is represented by the CIF card [CIF]
data_SiO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.488
_cell_length_b   4.488
_cell_length_c   4.488
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   90.394
_cell_formula_units_Z   4
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  0.000  0.500  0.500  1.0
  Si  Si1  1  0.500  0.500  0.000  1.0
  Si  Si2  1  0.500  0.000  0.500  1.0
  Si  Si3  1  0.000  0.000  0.000  1.0
  O  O4  1  0.344  0.156  0.844  1.0
  O  O5  1  0.156  0.844  0.344  1.0
  O  O6  1  0.844  0.344  0.156  1.0
  O  O7  1  0.656  0.656  0.656  1.0
  O  O8  1  0.344  0.344  0.344  1.0
  O  O9  1  0.156  0.656  0.844  1.0
  O  O10  1  0.844  0.156  0.656  1.0
  O  O11  1  0.656  0.844  0.156  1.0
[/CIF]
.
The structure described by SiO2 crystallizes in the cubic Pa-3 space group. Si(1) is bonded to six equivalent O(1) atoms to form corner-sharing SiO6 octahedra. The corner-sharing octahedral tilt angles are 60°. O(1) is bonded in a trigonal planar geometry to three equivalent Si(1) atoms. is represented by the CIF card [CIF]
data_SiO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.488
_cell_length_b   4.488
_cell_length_c   4.488
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   90.394
_cell_formula_units_Z   4
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  0.000  0.500  0.500  1.0
  Si  Si1  1  0.500  0.500  0.000  1.0
  Si  Si2  1  0.500  0.000  0.500  1.0
  Si  Si3  1  0.000  0.000  0.000  1.0
  O  O4  1  0.344  0.156  0.844  1.0
  O  O5  1  0.156  0.844  0.344  1.0
  O  O6  1  0.844  0.344  0.156  1.0
  O  O7  1  0.656  0.656  0.656  1.0
  O  O8  1  0.344  0.344  0.344  1.0
  O  O9  1  0.156  0.656  0.844  1.0
  O  O10  1  0.844  0.156  0.656  1.0
  O  O11  1  0.656  0.844  0.156  1.0
[/CIF]
.