data_[Ce2Pm1Cu1]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ce  1.1200  1.8500  1.0800
  Pm  1.1300  1.8500  1.1100
  Cu  1.9000  1.3500  0.8200
]
_symmetry_space_group_name_H-M [P4/mmm]
_cell_length_a [3.6185]
_cell_length_b [3.6185]
_cell_length_c [8.1739]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [123]
_chemical_formula_structural [Ce2PmCu]
_chemical_formula_sum '[Ce2 Pm1 Cu1]'
_cell_volume [107.0272]
_cell_formula_units_Z [1]
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
[
  Ce  Ce0  2  0.0000  0.0000  0.1899  1
  Pm  Pm1  1  0.5000  0.5000  0.5000  1
  Cu  Cu2  1  0.5000  0.5000  0.0000  1
]