data_[Si16O32]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Si  1.9000  1.1000  0.5400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [15.2363]
_cell_length_b [4.8286]
_cell_length_c [12.3187]
_cell_angle_alpha [90.0000]
_cell_angle_beta [123.1492]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [SiO2]
_chemical_formula_sum '[Si16 O32]'
_cell_volume [758.7912]
_cell_formula_units_Z [16]
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  8  0.1209  0.4455  0.1132  1
  Si  Si1  8  0.2433  0.0785  0.6091  1
  O  O2  8  0.1365  0.3851  0.2544  1
  O  O3  8  0.1647  0.2414  0.6338  1
  O  O4  8  0.1875  0.2302  0.0751  1
  O  O5  4  0.0000  0.5000  0.0000  1
  O  O6  4  0.2500  0.2500  0.5000  1
]