data_[Pm4Pr7Er1]
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 [P-1]
_cell_length_a [6.3623]
_cell_length_b [7.3560]
_cell_length_c [9.7150]
_cell_angle_alpha [79.0858]
_cell_angle_beta [71.0617]
_cell_angle_gamma [89.9628]
_symmetry_Int_Tables_number [2]
_chemical_formula_structural [Pm4Pr7Er]
_chemical_formula_sum '[Pm4 Pr7 Er1]'
_cell_volume [421.3786]
_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
[
  Pr  Pr0  2  0.1652  0.9170  0.3331  1
  Pm  Pm1  2  0.1668  0.4157  0.3340  1
  Pm  Pm2  2  0.3331  0.8341  0.6683  1
  Pr  Pr3  2  0.3331  0.3323  0.6674  1
  Pr  Pr4  2  0.4999  0.7520  0.9994  1
  Pr  Pr5  1  0.0000  0.5000  0.0000  1
  Er  Er6  1  0.0000  0.0000  0.0000  1
]