data_[Pm8Co4Si8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Co  1.8800  1.3500  0.7683
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [10.9969]
_cell_length_b [4.1789]
_cell_length_c [10.1948]
_cell_angle_alpha [90.0000]
_cell_angle_beta [119.8664]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Pm2CoSi2]
_chemical_formula_sum '[Pm8 Co4 Si8]'
_cell_volume [406.2803]
_cell_formula_units_Z [4]
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  0.0037  0.0000  0.6702  1
  Pm  Pm1  4  0.1858  0.0000  0.1006  1
  Co  Co2  4  0.2237  0.5000  0.3809  1
  Si  Si3  4  0.0044  0.5000  0.1310  1
  Si  Si4  4  0.1667  0.5000  0.5705  1
]