data_[Mg2Np4O12]
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
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pnnm]
_cell_length_a [5.0964]
_cell_length_b [5.5133]
_cell_length_c [9.2596]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [58]
_chemical_formula_structural [MgNp2O6]
_chemical_formula_sum '[Mg2 Np4 O12]'
_cell_volume [260.1767]
_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  0.5000  1
  Np  Np1  4  0.0000  0.5000  0.3140  1
  O  O2  8  0.2224  0.1716  0.3307  1
  O  O3  4  0.1838  0.6629  0.5000  1
]