data_[Er4Pu8Ru8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Er  1.2400  1.7500  1.0300
  Pu  1.2800  1.7500  0.9675
  Ru  2.2000  1.3000  0.6610
]
_symmetry_space_group_name_H-M [Imma]
_cell_length_a [4.4186]
_cell_length_b [8.3611]
_cell_length_c [12.7736]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [74]
_chemical_formula_structural [Er(PuRu)2]
_chemical_formula_sum '[Er4 Pu8 Ru8]'
_cell_volume [471.9120]
_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
[
  Er  Er0  4  0.0000  0.2500  0.9462  1
  Pu  Pu1  8  0.0000  0.0507  0.3579  1
  Ru  Ru2  4  0.0000  0.2500  0.1675  1
  Ru  Ru3  4  0.0000  0.2500  0.6960  1
]