data_K2O
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.23
_cell_length_b   5.23
_cell_length_c   7.59
_cell_angle_alpha   109.65
_cell_angle_beta   109.65
_cell_angle_gamma   90.03
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2O
_chemical_formula_sum   'K4 O2'
_cell_volume   182.41
_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  1  0.85  0.09  0.69  1.0
  K  K1  1  0.13  0.09  0.33  1.0
  K  K2  1  0.93  0.91  0.99  1.0
  K  K3  1  0.65  0.91  0.35  1.0
  O  O4  1  0.99  0.26  0.01  1.0
  O  O5  1  0.79  0.74  0.67  1.0

data_K2O
_symmetry_space_group_name_H-M   P-1
_cell_length_a   5.23
_cell_length_b   5.23
_cell_length_c   7.59
_cell_angle_alpha   109.65
_cell_angle_beta   109.65
_cell_angle_gamma   90.03
_symmetry_Int_Tables_number   2
_chemical_formula_structural   K2O
_chemical_formula_sum   'K4 O2'
_cell_volume   182.41
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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  0.26  0.91  0.01  1.0
  K  K1  2  0.46  0.09  0.35  1.0
  O  O2  2  0.4  0.74  0.33  1.0

K K K K O O