data_[Pm4Nd10Si8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Nd  1.1400  1.8500  1.2765
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [21.6934]
_cell_length_b [4.0679]
_cell_length_c [7.7356]
_cell_angle_alpha [90.0000]
_cell_angle_beta [99.2568]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Pm2Nd5Si4]
_chemical_formula_sum '[Pm4 Nd10 Si8]'
_cell_volume [673.7537]
_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  4  0.1705  0.0000  0.0937  1
  Nd  Nd1  4  0.0621  0.0000  0.4145  1
  Nd  Nd2  4  0.2013  0.0000  0.6452  1
  Nd  Nd3  2  0.0000  0.5000  0.0000  1
  Si  Si4  4  0.0671  0.0000  0.7977  1
  Si  Si5  4  0.1586  0.5000  0.3576  1
]