data_[K4C4O10]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  C  2.5500  0.7000  0.3000
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [12.2559]
_cell_length_b [4.4473]
_cell_length_c [5.3112]
_cell_angle_alpha [90.0000]
_cell_angle_beta [96.0975]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K2C2O5]
_chemical_formula_sum '[K4 C4 O10]'
_cell_volume [287.8528]
_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  0.1459  0.5000  0.4084  1
  C  C1  4  0.1122  0.0000  0.9432  1
  O  O2  4  0.1243  0.0000  0.7114  1
  O  O3  4  0.1820  0.0000  0.1329  1
  O  O4  2  0.0000  0.0000  0.0000  1
]