# generated using pymatgen
data_Si4O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   15.94830899
_cell_length_b   15.94830899
_cell_length_c   15.94830899
_cell_angle_alpha   152.75576200
_cell_angle_beta   152.75576200
_cell_angle_gamma   38.91065401
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Si4O9
_chemical_formula_sum   'Si16 O36'
_cell_volume   848.62521497
_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  0.95646100  0.04353900  0.50000000  1.0
  Si  Si1  1  0.54353900  0.45646100  0.50000000  1.0
  Si  Si2  1  0.20646100  0.79353900  0.00000000  1.0
  Si  Si3  1  0.79353900  0.20646100  0.00000000  1.0
  Si  Si4  1  0.95646100  0.45646100  0.91292100  1.0
  Si  Si5  1  0.54353900  0.04353900  0.08707900  1.0
  Si  Si6  1  0.20646100  0.20646100  0.41292100  1.0
  Si  Si7  1  0.79353900  0.79353900  0.58707900  1.0
  Si  Si8  1  0.17707200  0.47122200  0.29415000  1.0
  Si  Si9  1  0.17707200  0.88292200  0.70585000  1.0
  Si  Si10  1  0.57292800  0.36707800  0.79415000  1.0
  Si  Si11  1  0.57292800  0.77877800  0.20585000  1.0
  Si  Si12  1  0.52877800  0.82292800  0.70585000  1.0
  Si  Si13  1  0.11707800  0.82292800  0.29415000  1.0
  Si  Si14  1  0.63292200  0.42707200  0.20585000  1.0
  Si  Si15  1  0.22122200  0.42707200  0.79415000  1.0
  O  O16  1  0.13455500  0.28547100  0.15091600  1.0
  O  O17  1  0.13455500  0.98363900  0.84908400  1.0
  O  O18  1  0.61544500  0.26636100  0.65091600  1.0
  O  O19  1  0.61544500  0.96452900  0.34908400  1.0
  O  O20  1  0.71452900  0.86544500  0.84908400  1.0
  O  O21  1  0.01636100  0.86544500  0.15091600  1.0
  O  O22  1  0.73363900  0.38455500  0.34908400  1.0
  O  O23  1  0.03547100  0.38455500  0.65091600  1.0
  O  O24  1  0.22076100  0.63403500  0.94072100  1.0
  O  O25  1  0.69331400  0.28004100  0.05927900  1.0
  O  O26  1  0.05668600  0.96995900  0.44072100  1.0
  O  O27  1  0.52923900  0.61596500  0.55927900  1.0
  O  O28  1  0.22076100  0.28004100  0.58672700  1.0
  O  O29  1  0.69331400  0.63403500  0.41327300  1.0
  O  O30  1  0.05668600  0.61596500  0.08672700  1.0
  O  O31  1  0.52923900  0.96995900  0.91327300  1.0
  O  O32  1  0.36596500  0.77923900  0.05927900  1.0
  O  O33  1  0.71995900  0.30668600  0.94072100  1.0
  O  O34  1  0.03004100  0.94331400  0.55927900  1.0
  O  O35  1  0.38403500  0.47076100  0.44072100  1.0
  O  O36  1  0.36596500  0.30668600  0.58672700  1.0
  O  O37  1  0.71995900  0.77923900  0.41327300  1.0
  O  O38  1  0.03004100  0.47076100  0.08672700  1.0
  O  O39  1  0.38403500  0.94331400  0.91327300  1.0
  O  O40  1  0.34135600  0.84135600  0.50000000  1.0
  O  O41  1  0.40864400  0.40864400  0.00000000  1.0
  O  O42  1  0.15864400  0.65864400  0.50000000  1.0
  O  O43  1  0.59135600  0.59135600  0.00000000  1.0
  O  O44  1  0.01246100  0.25373500  0.24127400  1.0
  O  O45  1  0.01246100  0.77118800  0.75872600  1.0
  O  O46  1  0.73753900  0.47881200  0.74127400  1.0
  O  O47  1  0.73753900  0.99626500  0.25872600  1.0
  O  O48  1  0.74626500  0.98753900  0.75872600  1.0
  O  O49  1  0.22881200  0.98753900  0.24127400  1.0
  O  O50  1  0.52118800  0.26246100  0.25872600  1.0
  O  O51  1  0.00373500  0.26246100  0.74127400  1.0