data_[Mg2Np4Zn2O16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Mg  1.3100  1.5000  0.8600
  Np  1.3600  1.7500  1.0000
  Zn  1.6500  1.3500  0.8800
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I-4]
_cell_length_a [5.1637]
_cell_length_b [5.1637]
_cell_length_c [10.4843]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [82]
_chemical_formula_structural [MgNp2ZnO8]
_chemical_formula_sum '[Mg2 Np4 Zn2 O16]'
_cell_volume [279.5489]
_cell_formula_units_Z [2]
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
[
  Mg  Mg0  2  0.0000  0.0000  0.0000  1
  Np  Np1  2  0.0000  0.0000  0.5000  1
  Np  Np2  2  0.0000  0.5000  0.7500  1
  Zn  Zn3  2  0.0000  0.5000  0.2500  1
  O  O4  8  0.2020  0.7187  0.9094  1
  O  O5  8  0.2043  0.2304  0.3415  1
]