data_[Cu8Ag4As4O16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cu  1.9000  1.3500  0.8200
  Ag  1.9300  1.6000  1.0867
  As  2.1800  1.1500  0.6600
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Fmm2]
_cell_length_a [7.0590]
_cell_length_b [8.3721]
_cell_length_c [7.3313]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [42]
_chemical_formula_structural [Cu2AgAsO4]
_chemical_formula_sum '[Cu8 Ag4 As4 O16]'
_cell_volume [433.2695]
_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
[
  Cu  Cu0  8  0.2500  0.2500  0.1964  1.0
  Ag  Ag1  4  0.0000  0.0000  0.0276  1.0
  As  As2  4  0.0000  0.0000  0.5095  1.0
  O  O3  8  0.0000  0.1669  0.6582  1.0
  O  O4  8  0.2000  0.0000  0.3767  1.0
]