data_[Pm12Cu8Ag12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Cu  1.9000  1.3500  0.8200
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [4.1476]
_cell_length_b [10.4266]
_cell_length_c [16.8092]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [Pm3Cu2Ag3]
_chemical_formula_sum '[Pm12 Cu8 Ag12]'
_cell_volume [726.9247]
_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
[
  Pm  Pm0  8  0.0000  0.0672  0.6053  1
  Pm  Pm1  4  0.0000  0.3440  0.7500  1
  Cu  Cu2  8  0.0000  0.2222  0.1174  1
  Ag  Ag3  8  0.0000  0.3591  0.5316  1
  Ag  Ag4  4  0.0000  0.3702  0.2500  1
]