data_[Tb4Pm8Ho4Er16]
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
  Ho  1.2300  1.7500  1.0410
  Er  1.2400  1.7500  1.0300
]
_symmetry_space_group_name_H-M [Imma]
_cell_length_a [6.7829]
_cell_length_b [11.7485]
_cell_length_c [13.2333]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [74]
_chemical_formula_structural [TbPm2HoEr4]
_chemical_formula_sum '[Tb4 Pm8 Ho4 Er16]'
_cell_volume [1054.5511]
_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
[
  Tb  Tb0  4  0.0000  0.0000  0.0000  1
  Pm  Pm1  4  0.0000  0.0000  0.5000  1
  Pm  Pm2  4  0.2500  0.2500  0.7500  1
  Ho  Ho3  4  0.2500  0.2500  0.2500  1
  Er  Er4  8  0.0000  0.0031  0.2490  1
  Er  Er5  8  0.2491  0.2500  0.0029  1
]