data_[Np4Cu12Ge8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Np  1.3600  1.7500  1.0000
  Cu  1.9000  1.3500  0.8200
  Ge  2.0100  1.2500  0.7700
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [4.2518]
_cell_length_b [7.2241]
_cell_length_c [13.0018]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [NpCu3Ge2]
_chemical_formula_sum '[Np4 Cu12 Ge8]'
_cell_volume [399.3558]
_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
[
  Np  Np0  4  0.0000  0.0000  0.1315  1
  Cu  Cu1  8  0.0000  0.1990  0.3228  1
  Cu  Cu2  4  0.0000  0.3368  0.0000  1
  Ge  Ge3  4  0.0000  0.3233  0.5000  1
  Ge  Ge4  4  0.0000  0.5000  0.1878  1
]