data_[U18As6N18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  U  1.3800  1.7500  0.9913
  As  2.1800  1.1500  0.6600
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [6.6096]
_cell_length_b [6.6096]
_cell_length_c [20.5204]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [U3AsN3]
_chemical_formula_sum '[U18 As6 N18]'
_cell_volume [776.3541]
_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
[
  U  U0  18  0.0016  0.6570  0.9020  1
  As  As1  6  0.0000  0.0000  0.3335  1
  N  N2  18  0.0032  0.6736  0.1237  1
]