data_[Rb1Mg1Sn2As1]
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
  As  2.1800  1.1500  0.6600
]
_symmetry_space_group_name_H-M [P4/mmm]
_cell_length_a [6.0831]
_cell_length_b [6.0831]
_cell_length_c [5.6542]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [123]
_chemical_formula_structural [RbMgSn2As]
_chemical_formula_sum '[Rb1 Mg1 Sn2 As1]'
_cell_volume [209.2286]
_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  1  0.0000  0.0000  0.0000  1
  Mg  Mg1  1  0.5000  0.5000  0.5000  1
  Sn  Sn2  2  0.0000  0.5000  0.0000  1
  As  As3  1  0.0000  0.0000  0.5000  1
]