data_[Pm4Sm4Y4Er8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Sm  1.1700  1.8500  1.2290
  Y  1.2200  1.8000  1.0400
  Er  1.2400  1.7500  1.0300
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [8.3662]
_cell_length_b [11.5082]
_cell_length_c [7.1755]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [PmSmYEr2]
_chemical_formula_sum '[Pm4 Sm4 Y4 Er8]'
_cell_volume [690.8615]
_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  0.0000  0.0129  0.7500  1
  Sm  Sm1  4  0.0000  0.2802  0.7500  1
  Y  Y2  4  0.0000  0.2712  0.2500  1
  Er  Er3  8  0.1874  0.5000  0.0000  1
]