data_[Tb4Pm4Er4Mg2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Pm  1.1300  1.8500  1.1100
  Er  1.2400  1.7500  1.0300
  Mg  1.3100  1.5000  0.8600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [12.0622]
_cell_length_b [3.6399]
_cell_length_c [11.5533]
_cell_angle_alpha [90.0000]
_cell_angle_beta [118.0524]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Tb2Pm2Er2Mg]
_chemical_formula_sum '[Tb4 Pm4 Er4 Mg2]'
_cell_volume [447.6526]
_cell_formula_units_Z [2]
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
[
  Tb  Tb0  4  0.2487  0.5000  0.6312  1
  Pm  Pm1  4  0.0305  0.5000  0.7466  1
  Er  Er2  4  0.1792  0.5000  0.0847  1
  Mg  Mg3  2  0.0000  0.0000  0.5000  1
]