data_[Pm8Tm6Si8]
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
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [3.5210]
_cell_length_b [8.8427]
_cell_length_c [17.5535]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Pm4Tm3Si4]
_chemical_formula_sum '[Pm8 Tm6 Si8]'
_cell_volume [546.5301]
_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  0.1753  0.3321  1
  Tm  Tm1  4  0.0000  0.0000  0.0913  1
  Tm  Tm2  2  0.0000  0.5000  0.0000  1
  Si  Si3  4  0.0000  0.2767  0.5000  1
  Si  Si4  4  0.0000  0.5000  0.2795  1
]