data_[K1Rb2Mg1Cl1]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Rb  0.8200  2.3500  1.6600
  Mg  1.3100  1.5000  0.8600
  Cl  3.1600  1.0000  0.7800
]
_symmetry_space_group_name_H-M [P4/mmm]
_cell_length_a [6.4774]
_cell_length_b [6.4774]
_cell_length_c [6.1820]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [123]
_chemical_formula_structural [KRb2MgCl]
_chemical_formula_sum '[K1 Rb2 Mg1 Cl1]'
_cell_volume [259.3811]
_cell_formula_units_Z [1]
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
[
  Rb  Rb0  2  0.0000  0.5000  0.0000  1
  K  K1  1  0.0000  0.0000  0.5000  1
  Mg  Mg2  1  0.5000  0.5000  0.5000  1
  Cl  Cl3  1  0.0000  0.0000  0.0000  1
]