data_[Pm8Nd8Er4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Nd  1.1400  1.8500  1.2765
  Er  1.2400  1.7500  1.0300
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [9.7908]
_cell_length_b [8.0603]
_cell_length_c [9.3770]
_cell_angle_alpha [90.0000]
_cell_angle_beta [113.3983]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Pm2Nd2Er]
_chemical_formula_sum '[Pm8 Nd8 Er4]'
_cell_volume [679.1469]
_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  0.1614  0.0620  0.4776  1
  Nd  Nd1  8  0.1191  0.3359  0.1478  1
  Er  Er2  4  0.0000  0.2825  0.7500  1
]