data_[Np3Si3Ag3]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Np  1.3600  1.7500  1.0000
  Si  1.9000  1.1000  0.5400
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [P-62m]
_cell_length_a [6.8190]
_cell_length_b [6.8190]
_cell_length_c [4.4423]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [189]
_chemical_formula_structural [NpSiAg]
_chemical_formula_sum '[Np3 Si3 Ag3]'
_cell_volume [178.8905]
_cell_formula_units_Z [3]
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  3  0.0000  0.4325  0.5000  1
  Si  Si1  2  0.3333  0.6667  0.0000  1
  Si  Si2  1  0.0000  0.0000  0.5000  1
  Ag  Ag3  3  0.0000  0.7563  0.0000  1
]