data_[Sm4Er4Np4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sm  1.1700  1.8500  1.2290
  Er  1.2400  1.7500  1.0300
  Np  1.3600  1.7500  1.0000
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [16.8050]
_cell_length_b [3.5387]
_cell_length_c [5.9290]
_cell_angle_alpha [90.0000]
_cell_angle_beta [102.0192]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [SmErNp]
_chemical_formula_sum '[Sm4 Er4 Np4]'
_cell_volume [344.8556]
_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
[
  Sm  Sm0  4  0.1235  0.0000  0.3237  1
  Er  Er1  4  0.0670  0.5000  0.7937  1
  Np  Np2  4  0.2380  0.0000  0.8621  1
]