data_[Ce4Pm8Tm20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ce  1.1200  1.8500  1.0800
  Pm  1.1300  1.8500  1.1100
  Tm  1.2500  1.7500  1.0950
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [18.7297]
_cell_length_b [6.0124]
_cell_length_c [9.2461]
_cell_angle_alpha [90.0000]
_cell_angle_beta [104.7533]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [CePm2Tm5]
_chemical_formula_sum '[Ce4 Pm8 Tm20]'
_cell_volume [1006.8768]
_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
[
  Ce  Ce0  4  0.2500  0.2500  0.5000  1
  Pm  Pm1  8  0.1239  0.1802  0.1256  1
  Tm  Tm2  8  0.0616  0.3285  0.4358  1
  Tm  Tm3  8  0.1841  0.2958  0.8113  1
  Tm  Tm4  4  0.0000  0.1700  0.7500  1
]