data_[Pm2Hf2Sn4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Hf  1.3000  1.5500  0.8500
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [I4/mmm]
_cell_length_a [4.7221]
_cell_length_b [4.7221]
_cell_length_c [8.8634]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [139]
_chemical_formula_structural [PmHfSn2]
_chemical_formula_sum '[Pm2 Hf2 Sn4]'
_cell_volume [197.6403]
_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  0.0000  0.0000  0.5000  1
  Hf  Hf1  2  0.0000  0.0000  0.0000  1
  Sn  Sn2  4  0.0000  0.5000  0.2500  1
]