data_SiO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.82
_cell_length_b   7.8
_cell_length_c   5.32
_cell_angle_alpha   82.15
_cell_angle_beta   61.15
_cell_angle_gamma   36.71
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiO2
_chemical_formula_sum   'Si4 O8'
_cell_volume   168.32
_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  0.19  0.38  0.94  1.0
  Si  Si1  1  0.38  0.76  0.08  1.0
  Si  Si2  1  0.38  0.76  0.77  1.0
  Si  Si3  1  0.19  0.38  0.49  1.0
  O  O4  1  0.79  0.19  0.57  1.0
  O  O5  1  0.79  0.57  0.86  1.0
  O  O6  1  0.6  0.19  0.86  1.0
  O  O7  1  0.6  0.57  0.57  1.0
  O  O8  1  0.38  0.53  0.43  1.0
  O  O9  1  0.38  0.99  0.43  1.0
  O  O10  1  0.57  0.91  0.14  1.0
  O  O11  1  0.57  0.37  0.14  1.0

data_SiO2
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.76
_cell_length_b   5.32
_cell_length_c   7.8
_cell_angle_alpha   82.15
_cell_angle_beta   72.22
_cell_angle_gamma   63.42
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiO2
_chemical_formula_sum   'Si4 O8'
_cell_volume   168.32
_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  0.06  0.13  0.43  1.0
  Si  Si1  1  0.23  0.16  0.86  1.0
  Si  Si2  1  0.51  0.68  0.43  1.0
  Si  Si3  1  0.92  0.46  0.86  1.0
  O  O4  1  0.14  0.45  0.21  1.0
  O  O5  1  0.14  0.64  0.64  1.0
  O  O6  1  0.43  0.36  0.02  1.0
  O  O7  1  0.43  0.16  0.84  1.0
  O  O8  1  0.57  0.81  0.09  1.0
  O  O9  1  0.57  0.81  0.63  1.0
  O  O10  1  0.86  0.71  0.06  1.0
  O  O11  1  0.86  0.71  0.52  1.0

Si Si Si Si O O O O O O O O