data_[Pm4Cu12Sn8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Cu  1.9000  1.3500  0.8200
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [16.2720]
_cell_length_b [4.3866]
_cell_length_c [7.5065]
_cell_angle_alpha [90.0000]
_cell_angle_beta [116.1073]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [PmCu3Sn2]
_chemical_formula_sum '[Pm4 Cu12 Sn8]'
_cell_volume [481.1318]
_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  0.1486  0.0000  0.0958  1
  Cu  Cu1  4  0.0043  0.0000  0.6635  1
  Cu  Cu2  4  0.0873  0.5000  0.6322  1
  Cu  Cu3  4  0.2009  0.5000  0.4763  1
  Sn  Sn4  4  0.0297  0.5000  0.2085  1
  Sn  Sn5  4  0.1872  0.0000  0.6908  1
]