data_[K4Np2As4O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Np  1.3600  1.7500  1.0000
  As  2.1800  1.1500  0.6600
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [9.8973]
_cell_length_b [6.9613]
_cell_length_c [6.1966]
_cell_angle_alpha [90.0000]
_cell_angle_beta [114.3436]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K2Np(AsO3)2]
_chemical_formula_sum '[K4 Np2 As4 O12]'
_cell_volume [388.9775]
_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
[
  K  K0  4  0.2051  0.5000  0.1345  1
  Np  Np1  2  0.0000  0.5000  0.5000  1
  As  As2  4  0.0594  0.0000  0.2439  1
  O  O3  8  0.0215  0.3003  0.2803  1
  O  O4  4  0.2461  0.0000  0.2787  1
]