data_[Pu4Cr8Si4N4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pu  1.2800  1.7500  0.9675
  Cr  1.6600  1.4000  0.9400
  Si  1.9000  1.1000  0.5400
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [3.4513]
_cell_length_b [10.7836]
_cell_length_c [7.3510]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [PuCr2SiN]
_chemical_formula_sum '[Pu4 Cr8 Si4 N4]'
_cell_volume [273.5874]
_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
[
  Pu  Pu0  4  0.0000  0.4633  0.7500  1
  Cr  Cr1  8  0.0000  0.1702  0.5522  1
  Si  Si2  4  0.0000  0.2592  0.2500  1
  N  N3  4  0.0000  0.0000  0.0000  1
]