data_[Pm4Be2Si5]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Be  1.5700  1.0500  0.5900
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [P2/m]
_cell_length_a [6.8211]
_cell_length_b [4.2699]
_cell_length_c [7.7011]
_cell_angle_alpha [90.0000]
_cell_angle_beta [92.0503]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [10]
_chemical_formula_structural [Pm4Be2Si5]
_chemical_formula_sum '[Pm4 Be2 Si5]'
_cell_volume [224.1542]
_cell_formula_units_Z [1]
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  0.2306  0.5000  0.1348  1
  Pm  Pm1  2  0.2632  0.5000  0.6328  1
  Be  Be2  2  0.0764  0.0000  0.3820  1
  Si  Si3  2  0.0980  0.0000  0.8731  1
  Si  Si4  2  0.4053  0.0000  0.3664  1
  Si  Si5  1  0.5000  0.0000  0.0000  1
]