data_[Li8Cu4As4O16]
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
  As  2.1800  1.1500  0.6600
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [6.9797]
_cell_length_b [5.1741]
_cell_length_c [10.9090]
_cell_angle_alpha [90.0000]
_cell_angle_beta [91.4689]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [Li2CuAsO4]
_chemical_formula_sum '[Li8 Cu4 As4 O16]'
_cell_volume [393.8338]
_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  0.0114  0.2316  0.8463  1
  Li  Li1  4  0.3220  0.7301  0.3004  1
  Cu  Cu2  4  0.4999  0.1954  0.4137  1
  As  As3  4  0.2354  0.2493  0.1121  1
  O  O4  4  0.0226  0.1490  0.1704  1
  O  O5  4  0.2470  0.2020  0.9548  1
  O  O6  4  0.2493  0.5840  0.1354  1
  O  O7  4  0.4163  0.0858  0.1905  1
]