data_[Pm21Pr36Mg3]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Pr  1.1300  1.8500  1.0600
  Mg  1.3100  1.5000  0.8600
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [12.4278]
_cell_length_b [12.4278]
_cell_length_c [15.9625]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [Pm7Pr12Mg]
_chemical_formula_sum '[Pm21 Pr36 Mg3]'
_cell_volume [2135.1167]
_cell_formula_units_Z [3]
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
[
  Pr  Pr0  18  0.0295  0.4494  0.7159  1
  Pm  Pm1  18  0.0559  0.1861  0.7972  1
  Pr  Pr2  18  0.0563  0.5888  0.0828  1
  Pm  Pm3  3  -0.0000  0.0000  0.5000  1
  Mg  Mg4  3  0.0000  0.0000  0.0000  1
]