data_[Rb6Mg6Sn16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  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 [Immm]
_cell_length_a [4.8626]
_cell_length_b [12.9782]
_cell_length_c [14.0256]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Rb3Mg3Sn8]
_chemical_formula_sum '[Rb6 Mg6 Sn16]'
_cell_volume [885.1327]
_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
[
  Rb  Rb0  4  0.0000  0.0000  0.2350  1.0
  Rb  Rb1  2  0.0000  0.0000  0.5000  1.0
  Mg  Mg2  4  0.0000  0.1432  0.0000  1.0
  Mg  Mg3  2  0.0000  0.5000  0.5000  1.0
  Sn  Sn4  8  0.0000  0.3084  0.3561  1.0
  Sn  Sn5  8  0.0000  0.3303  0.1294  1.0
]