data_[Pm20Pr4Er4]
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/c]
_cell_length_a [8.7897]
_cell_length_b [9.9222]
_cell_length_c [11.7582]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.8810]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Pm5PrEr]
_chemical_formula_sum '[Pm20 Pr4 Er4]'
_cell_volume [964.3530]
_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  0.1192  0.4328  0.1625  1
  Pm  Pm1  8  0.1701  0.0987  0.0355  1
  Pm  Pm2  4  0.0000  0.0966  0.2500  1
  Pr  Pr3  4  0.0000  0.2524  0.7500  1
  Er  Er4  4  0.2500  0.2500  0.5000  1
]