data_[Pm4Pr2Si4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Pr  1.1300  1.8500  1.0600
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [5.8252]
_cell_length_b [4.1575]
_cell_length_c [11.6494]
_cell_angle_alpha [90.0000]
_cell_angle_beta [95.1039]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [Pm2PrSi2]
_chemical_formula_sum '[Pm4 Pr2 Si4]'
_cell_volume [281.0072]
_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  2  0.0966  0.2500  0.8719  1
  Pm  Pm1  2  0.2532  0.2500  0.5565  1
  Pr  Pr2  2  0.3962  0.2500  0.2177  1
  Si  Si3  2  0.2366  0.7500  0.3750  1
  Si  Si4  2  0.3819  0.7500  0.0197  1
]