data_[Pm4Pr4Sm4Er12]
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
  Sm  1.1700  1.8500  1.2290
  Er  1.2400  1.7500  1.0300
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [19.8307]
_cell_length_b [5.6103]
_cell_length_c [7.1080]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.1118]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [PmPrSmEr3]
_chemical_formula_sum '[Pm4 Pr4 Sm4 Er12]'
_cell_volume [790.8074]
_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  4  0.0542  0.0000  0.2564  1
  Pr  Pr1  4  0.1470  0.5000  0.0367  1
  Sm  Sm2  4  0.1488  0.5000  0.4590  1
  Er  Er3  4  0.0241  0.5000  0.7445  1
  Er  Er4  4  0.1647  0.0000  0.7430  1
  Er  Er5  4  0.2217  0.0000  0.2481  1
]