data_[K4Mg4O6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Mg  1.3100  1.5000  0.8600
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [5.9511]
_cell_length_b [6.3025]
_cell_length_c [6.3859]
_cell_angle_alpha [90.0000]
_cell_angle_beta [114.0643]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [K2Mg2O3]
_chemical_formula_sum '[K4 Mg4 O6]'
_cell_volume [218.6968]
_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  0.1782  0.6324  0.9264  1.0
  Mg  Mg1  4  0.3372  0.1077  0.0760  1.0
  O  O2  4  0.4171  0.1417  0.7940  1.0
  O  O3  2  0.0000  0.0000  0.0000  1.0
]