data_[K6Na8As8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Na  0.9300  1.8000  1.1600
  As  2.1800  1.1500  0.6600
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [5.0843]
_cell_length_b [7.7099]
_cell_length_c [16.8053]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [K3(NaAs)4]
_chemical_formula_sum '[K6 Na8 As8]'
_cell_volume [658.7625]
_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  0.0000  0.0000  0.1303  1.0
  K  K1  2  0.0000  0.5000  0.0000  1.0
  Na  Na2  8  0.0000  0.2066  0.3226  1.0
  As  As3  4  0.0000  0.3495  0.5000  1.0
  As  As4  4  0.0000  0.5000  0.2033  1.0
]