data_[Ce4Pm4Tm8]
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/m]
_cell_length_a [12.9252]
_cell_length_b [3.4693]
_cell_length_c [10.9855]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.2600]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [CePmTm2]
_chemical_formula_sum '[Ce4 Pm4 Tm8]'
_cell_volume [492.5943]
_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  0.1092  0.0000  0.5085  1
  Pm  Pm1  4  0.1321  0.0000  0.9824  1
  Tm  Tm2  4  0.0202  0.5000  0.2484  1
  Tm  Tm3  4  0.2454  0.5000  0.7394  1
]