data_[Si64O128]
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 [I4_1/amd]
_cell_length_a [10.3523]
_cell_length_b [10.3523]
_cell_length_c [34.7528]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [141]
_chemical_formula_structural [SiO2]
_chemical_formula_sum '[Si64 O128]'
_cell_volume [3724.4953]
_cell_formula_units_Z [64]
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  16  0.0000  0.1515  0.6795  1
  Si  Si1  16  0.0000  0.1527  0.8404  1
  Si  Si2  16  0.0000  0.2148  0.4933  1
  Si  Si3  16  0.2200  0.2500  0.6250  1
  O  O4  32  0.1274  0.1879  0.8657  1
  O  O5  32  0.1296  0.2204  0.6624  1
  O  O6  16  0.0000  0.1660  0.7261  1
  O  O7  16  0.0000  0.2315  0.8003  1
  O  O8  16  0.1294  0.1294  0.5000  1
  O  O9  8  0.0000  0.0000  0.1693  1
  O  O10  8  0.0000  0.0000  0.3330  1
]