data_[Np12P18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Np  1.3600  1.7500  1.0000
  P  2.1900  1.0000  0.5500
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [5.6117]
_cell_length_b [5.6117]
_cell_length_c [21.7656]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Np2P3]
_chemical_formula_sum '[Np12 P18]'
_cell_volume [593.5887]
_cell_formula_units_Z [6]
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  6  0.0000  0.0000  0.1154  1
  Np  Np1  6  0.0000  0.0000  0.3457  1
  P  P2  18  0.0431  0.5215  0.8956  1
]