data_[K2Na2Mg2Cl8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Na  0.9300  1.8000  1.1600
  Mg  1.3100  1.5000  0.8600
  Cl  3.1600  1.0000  0.7800
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [7.0516]
_cell_length_b [7.1770]
_cell_length_c [8.4683]
_cell_angle_alpha [90.0000]
_cell_angle_beta [106.7717]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [KNaMgCl4]
_chemical_formula_sum '[K2 Na2 Mg2 Cl8]'
_cell_volume [410.3460]
_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  0.2450  0.2500  0.0534  1
  Na  Na1  2  0.2060  0.2500  0.5514  1
  Mg  Mg2  2  0.2576  0.7500  0.3266  1
  Cl  Cl3  4  0.0230  0.5055  0.2765  1
  Cl  Cl4  2  0.4539  0.7500  0.1482  1
  Cl  Cl5  2  0.4749  0.7500  0.5917  1
]