data_[K2Si8O14]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Si  1.9000  1.1000  0.5400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pmn2_1]
_cell_length_a [9.6775]
_cell_length_b [5.0208]
_cell_length_c [7.8601]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [31]
_chemical_formula_structural [KSi4O7]
_chemical_formula_sum '[K2 Si8 O14]'
_cell_volume [381.9105]
_cell_formula_units_Z [2]
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
[
  K  K0  2  0.0000  0.7514  0.7277  1
  Si  Si1  4  0.1532  0.2737  0.4094  1
  Si  Si2  4  0.1670  0.2405  0.9977  1
  O  O3  4  0.1472  0.2646  0.2056  1
  O  O4  4  0.1851  0.5770  0.4740  1
  O  O5  4  0.2259  0.9249  0.9780  1
  O  O6  2  0.0000  0.1905  0.4882  1
]