data_[K20Cu4C4O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Cu  1.9000  1.3500  0.8200
  C  2.5500  0.7000  0.3000
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Aem2]
_cell_length_a [8.8654]
_cell_length_b [10.9398]
_cell_length_c [10.6539]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [39]
_chemical_formula_structural [K5CuCO5]
_chemical_formula_sum '[K20 Cu4 C4 O20]'
_cell_volume [1033.2772]
_cell_formula_units_Z [4]
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  8  0.2514  0.0348  0.5042  1
  K  K1  4  0.2344  0.2500  0.8008  1
  K  K2  4  0.2411  0.2500  0.2146  1
  K  K3  4  0.5000  0.0000  0.2479  1
  Cu  Cu4  4  0.0000  0.0000  0.2509  1
  C  C5  4  0.4859  0.2500  0.0209  1
  O  O6  8  0.2029  0.0137  0.2515  1
  O  O7  8  0.4481  0.1466  0.9686  1
  O  O8  4  0.4411  0.2500  0.6272  1
]