The compound described by SiO2 is low (alpha) Cristobalite-like structured and crystallizes in the trigonal R-3c space group. Si(1) is bonded to four equivalent O(1) atoms to form distorted corner-sharing SiO4 tetrahedra. O(1) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms. is represented by the CIF file [CIF]
data_SiO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.927
_cell_length_b   5.927
_cell_length_c   5.927
_cell_angle_alpha   89.149
_cell_angle_beta   89.149
_cell_angle_gamma   89.149
_symmetry_Int_Tables_number   1
_cell_volume   208.180
_cell_formula_units_Z   6
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  0.875  0.250  0.625  1.0
  Si  Si1  1  0.375  0.125  0.750  1.0
  Si  Si2  1  0.750  0.375  0.125  1.0
  Si  Si3  1  0.125  0.750  0.375  1.0
  Si  Si4  1  0.250  0.625  0.875  1.0
  Si  Si5  1  0.625  0.875  0.250  1.0
  O  O6  1  0.631  0.124  0.126  1.0
  O  O7  1  0.626  0.624  0.131  1.0
  O  O8  1  0.869  0.374  0.376  1.0
  O  O9  1  0.131  0.626  0.624  1.0
  O  O10  1  0.124  0.126  0.631  1.0
  O  O11  1  0.376  0.869  0.374  1.0
  O  O12  1  0.369  0.876  0.874  1.0
  O  O13  1  0.624  0.131  0.626  1.0
  O  O14  1  0.874  0.369  0.876  1.0
  O  O15  1  0.374  0.376  0.869  1.0
  O  O16  1  0.126  0.631  0.124  1.0
  O  O17  1  0.876  0.874  0.369  1.0
[/CIF]
.
The compound described by SiO2 is low (alpha) Cristobalite-like structured and crystallizes in the trigonal R-3c space group. Si(1) is bonded to four equivalent O(1) atoms to form distorted corner-sharing SiO4 tetrahedra. O(1) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms. is represented by the CIF file [CIF]
data_SiO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.927
_cell_length_b   5.927
_cell_length_c   5.927
_cell_angle_alpha   89.149
_cell_angle_beta   89.149
_cell_angle_gamma   89.149
_symmetry_Int_Tables_number   1
_cell_volume   208.180
_cell_formula_units_Z   6
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  0.875  0.250  0.625  1.0
  Si  Si1  1  0.375  0.125  0.750  1.0
  Si  Si2  1  0.750  0.375  0.125  1.0
  Si  Si3  1  0.125  0.750  0.375  1.0
  Si  Si4  1  0.250  0.625  0.875  1.0
  Si  Si5  1  0.625  0.875  0.250  1.0
  O  O6  1  0.631  0.124  0.126  1.0
  O  O7  1  0.626  0.624  0.131  1.0
  O  O8  1  0.869  0.374  0.376  1.0
  O  O9  1  0.131  0.626  0.624  1.0
  O  O10  1  0.124  0.126  0.631  1.0
  O  O11  1  0.376  0.869  0.374  1.0
  O  O12  1  0.369  0.876  0.874  1.0
  O  O13  1  0.624  0.131  0.626  1.0
  O  O14  1  0.874  0.369  0.876  1.0
  O  O15  1  0.374  0.376  0.869  1.0
  O  O16  1  0.126  0.631  0.124  1.0
  O  O17  1  0.876  0.874  0.369  1.0
[/CIF]
.