data_[Pm8Tm10]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Tm  1.2500  1.7500  1.0950
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [3.6567]
_cell_length_b [12.1110]
_cell_length_c [12.9986]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Pm4Tm5]
_chemical_formula_sum '[Pm8 Tm10]'
_cell_volume [575.6567]
_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
[
  Pm  Pm0  8  0.0000  0.3568  0.3110  1
  Tm  Tm1  4  0.0000  0.0000  0.3752  1
  Tm  Tm2  4  0.0000  0.2968  0.0000  1
  Tm  Tm3  2  0.0000  0.0000  0.0000  1
]