data_[K2Ni2Sb2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Ni  1.9100  1.3500  0.7400
  Sb  2.0500  1.4500  0.8300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cm]
_cell_length_a [12.6280]
_cell_length_b [3.1485]
_cell_length_c [5.2811]
_cell_angle_alpha [90.0000]
_cell_angle_beta [95.2063]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [8]
_chemical_formula_structural [KNiSbO4]
_chemical_formula_sum '[K2 Ni2 Sb2 O8]'
_cell_volume [209.1098]
_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  2  0.2524  0.0000  0.4183  1.0
  Ni  Ni1  2  0.0031  0.5000  0.5023  1.0
  Sb  Sb2  2  0.4991  0.5000  0.9972  1.0
  O  O3  2  0.0811  0.0000  0.6998  1.0
  O  O4  2  0.0866  0.5000  0.1765  1.0
  O  O5  2  0.4139  0.0000  0.8233  1.0
  O  O6  2  0.4194  0.5000  0.3009  1.0
]