data_[K8Si4O12]
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 [C2/m]
_cell_length_a [10.9934]
_cell_length_b [5.7323]
_cell_length_c [7.7184]
_cell_angle_alpha [90.0000]
_cell_angle_beta [126.9308]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K2SiO3]
_chemical_formula_sum '[K8 Si4 O12]'
_cell_volume [388.8020]
_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
[
  K  K0  4  0.0612  0.0000  0.3397  1
  K  K1  4  0.1862  0.5000  0.7885  1
  Si  Si2  4  0.1209  0.5000  0.1840  1
  O  O3  4  0.0000  0.2882  0.0000  1
  O  O4  4  0.1207  0.5000  0.3916  1
  O  O5  4  0.2188  0.0000  0.7791  1
]