data_[Pm7Nd2Er4]
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 [P-1]
_cell_length_a [6.2471]
_cell_length_b [6.2629]
_cell_length_c [11.4094]
_cell_angle_alpha [90.0941]
_cell_angle_beta [100.5512]
_cell_angle_gamma [99.7758]
_symmetry_Int_Tables_number [2]
_chemical_formula_structural [Pm7(NdEr2)2]
_chemical_formula_sum '[Pm7 Nd2 Er4]'
_cell_volume [432.2240]
_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
[
  Pm  Pm0  2  0.0783  0.8452  0.3053  1
  Pm  Pm1  2  0.2313  0.5398  0.9238  1
  Pm  Pm2  2  0.3848  0.2318  0.5389  1
  Pm  Pm3  1  0.0000  0.0000  0.0000  1
  Nd  Nd4  2  0.1528  0.6948  0.6174  1
  Er  Er5  2  0.3095  0.3842  0.2286  1
  Er  Er6  2  0.4632  0.0779  0.8479  1
]