data_[Rb2Sr2As2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Sr  0.9500  2.0000  1.3200
  As  2.1800  1.1500  0.6600
]
_symmetry_space_group_name_H-M [P4/nmm]
_cell_length_a [5.4809]
_cell_length_b [5.4809]
_cell_length_c [8.0861]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [129]
_chemical_formula_structural [RbSrAs]
_chemical_formula_sum '[Rb2 Sr2 As2]'
_cell_volume [242.9098]
_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  2  0.0000  0.5000  0.3826  1.0
  Sr  Sr1  2  0.0000  0.0000  0.0000  1.0
  As  As2  2  0.0000  0.5000  0.8095  1.0
]