data_[Np2Si4Hg2O16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Np  1.3600  1.7500  1.0000
  Si  1.9000  1.1000  0.5400
  Hg  2.0000  1.5000  1.2450
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [9.2317]
_cell_length_b [5.6225]
_cell_length_c [8.4799]
_cell_angle_alpha [90.0000]
_cell_angle_beta [103.6109]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [NpSi2HgO8]
_chemical_formula_sum '[Np2 Si4 Hg2 O16]'
_cell_volume [427.7904]
_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
[
  Np  Np0  2  0.0000  0.0000  0.0000  1
  Si  Si1  4  0.1960  0.5000  0.2099  1
  Hg  Hg2  2  0.0000  0.0000  0.5000  1
  O  O3  8  0.0882  0.2625  0.1690  1
  O  O4  4  0.1897  0.0000  0.9137  1
  O  O5  4  0.2190  0.0000  0.6001  1
]