data_[K4Rb4Mg4Sn4]
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
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [Ama2]
_cell_length_a [6.6307]
_cell_length_b [8.9483]
_cell_length_c [11.3230]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [40]
_chemical_formula_structural [KRbMgSn]
_chemical_formula_sum '[K4 Rb4 Mg4 Sn4]'
_cell_volume [671.8352]
_cell_formula_units_Z [4]
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  4  0.2500  0.1387  0.1711  1
  K  K1  4  0.2500  0.1388  0.8286  1
  Mg  Mg2  4  0.0000  0.0000  0.4995  1
  Sn  Sn3  4  0.2500  0.2534  0.5008  1
]