data_[Li8Cu4Si4O16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Li  0.9800  1.4500  0.9000
  Cu  1.9000  1.3500  0.8200
  Si  1.9000  1.1000  0.5400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C222_1]
_cell_length_a [7.3054]
_cell_length_b [7.6951]
_cell_length_c [6.2076]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [20]
_chemical_formula_structural [Li2CuSiO4]
_chemical_formula_sum '[Li8 Cu4 Si4 O16]'
_cell_volume [348.9656]
_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
[
  Li  Li0  4  0.0000  0.1831  0.2500  1.0
  Li  Li1  4  0.1825  0.5000  0.5000  1.0
  Cu  Cu2  4  0.0000  0.1817  0.7500  1.0
  Si  Si3  4  0.1782  0.5000  0.0000  1.0
  O  O4  8  0.0378  0.3307  0.9993  1.0
  O  O5  8  0.1951  0.0026  0.2809  1.0
]