data_[Co2Cu2As4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Co  1.8800  1.3500  0.7683
  Cu  1.9000  1.3500  0.8200
  As  2.1800  1.1500  0.6600
]
_symmetry_space_group_name_H-M [Amm2]
_cell_length_a [4.5630]
_cell_length_b [3.7111]
_cell_length_c [7.7524]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [CoCuAs2]
_chemical_formula_sum '[Co2 Cu2 As4]'
_cell_volume [131.2766]
_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
[
  Co  Co0  2  0.0000  0.0000  0.5335  1
  Cu  Cu1  2  0.5000  0.0000  0.7101  1
  As  As2  2  0.0000  0.0000  0.8462  1
  As  As3  2  0.5000  0.0000  0.4110  1
]