data_[Pm12Y4Er8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Y  1.2200  1.8000  1.0400
  Er  1.2400  1.7500  1.0300
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [22.1572]
_cell_length_b [3.6622]
_cell_length_c [11.4605]
_cell_angle_alpha [90.0000]
_cell_angle_beta [121.0618]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Pm3YEr2]
_chemical_formula_sum '[Pm12 Y4 Er8]'
_cell_volume [796.6022]
_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  4  0.0546  0.0000  0.4265  1
  Pm  Pm1  4  0.1131  0.5000  0.7419  1
  Pm  Pm2  4  0.2239  0.5000  0.6008  1
  Y  Y3  4  0.1096  0.5000  0.2296  1
  Er  Er4  4  0.0563  0.0000  0.9333  1
  Er  Er5  4  0.2213  0.5000  0.0938  1
]