data_[Ca4Cu4Se4O4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  Cu  1.9000  1.3500  0.8200
  Se  2.5500  1.1500  1.0133
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_12_12_1]
_cell_length_a [5.9290]
_cell_length_b [6.5710]
_cell_length_c [6.8864]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [19]
_chemical_formula_structural [CaCuSeO]
_chemical_formula_sum '[Ca4 Cu4 Se4 O4]'
_cell_volume [268.2901]
_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
[
  Ca  Ca0  4  0.1621  0.5871  0.2951  1
  Cu  Cu1  4  0.1614  0.8778  0.6101  1
  Se  Se2  4  0.1400  0.8496  0.9454  1
  O  O3  4  0.0913  0.3381  0.0624  1
]