data_[Pm18Tm18Mg6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Tm  1.2500  1.7500  1.0950
  Mg  1.3100  1.5000  0.8600
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [6.1798]
_cell_length_b [6.1798]
_cell_length_c [41.7833]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [Pm3Tm3Mg]
_chemical_formula_sum '[Pm18 Tm18 Mg6]'
_cell_volume [1381.9391]
_cell_formula_units_Z [6]
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  18  0.0002  0.6665  0.0654  1
  Tm  Tm1  18  0.0002  0.6673  0.8668  1
  Mg  Mg2  6  0.0000  0.0000  0.3333  1
]