data_[Np4Mn20Si12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Np  1.3600  1.7500  1.0000
  Mn  1.5500  1.4000  0.6483
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [4.0832]
_cell_length_b [12.4020]
_cell_length_c [9.5054]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [NpMn5Si3]
_chemical_formula_sum '[Np4 Mn20 Si12]'
_cell_volume [481.3508]
_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  0.2389  0.2500  1
  Mn  Mn1  8  0.0000  0.1995  0.0146  1
  Mn  Mn2  8  0.0000  0.4090  0.1156  1
  Mn  Mn3  4  0.0000  0.0000  0.0000  1
  Si  Si4  8  0.0000  0.3935  0.6207  1
  Si  Si5  4  0.0000  0.0841  0.7500  1
]