data_[Pm6Pr4Er12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Pr  1.1300  1.8500  1.0600
  Er  1.2400  1.7500  1.0300
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [6.1538]
_cell_length_b [10.6730]
_cell_length_c [11.6899]
_cell_angle_alpha [90.0000]
_cell_angle_beta [100.1303]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Pm3(PrEr3)2]
_chemical_formula_sum '[Pm6 Pr4 Er12]'
_cell_volume [755.8105]
_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
[
  Pr  Pr0  4  0.0000  0.1668  0.5000  1
  Pm  Pm1  4  0.0000  0.3358  0.0000  1
  Pm  Pm2  2  0.0000  0.0000  0.0000  1
  Er  Er3  8  0.2497  0.8335  0.2490  1
  Er  Er4  4  0.2490  0.5000  0.2488  1
]