data_[Pm2Ho16Mg4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Ho  1.2300  1.7500  1.0410
  Mg  1.3100  1.5000  0.8600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [8.6975]
_cell_length_b [15.3947]
_cell_length_c [5.6389]
_cell_angle_alpha [90.0000]
_cell_angle_beta [115.3340]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Pm(Ho4Mg)2]
_chemical_formula_sum '[Pm2 Ho16 Mg4]'
_cell_volume [682.4116]
_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
  Ho  Ho1  8  0.2093  0.1121  0.1306  1
  Ho  Ho2  4  0.0000  0.2144  0.5000  1
  Ho  Ho3  4  0.0922  0.5000  0.2966  1
  Mg  Mg4  4  0.0000  0.3070  0.0000  1
]