data_[Pm4Pa4Ni8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Pa  1.5000  1.8000  1.0400
  Ni  1.9100  1.3500  0.7400
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [6.8298]
_cell_length_b [10.5901]
_cell_length_c [4.2865]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [PmPaNi2]
_chemical_formula_sum '[Pm4 Pa4 Ni8]'
_cell_volume [310.0386]
_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  0.0000  0.1147  0.2500  1
  Pa  Pa1  4  0.0000  0.4043  0.7500  1
  Ni  Ni2  8  0.2204  0.3350  0.2500  1
]