data_[Rb2Ca4Cl4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ca  1.0000  1.8000  1.1400
  Cl  3.1600  1.0000  0.7800
]
_symmetry_space_group_name_H-M [P4/mbm]
_cell_length_a [11.2654]
_cell_length_b [11.2654]
_cell_length_c [3.5870]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [127]
_chemical_formula_structural [RbCa2Cl2]
_chemical_formula_sum '[Rb2 Ca4 Cl4]'
_cell_volume [455.2248]
_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  0.0000  0.0000  1
  Ca  Ca1  4  0.1104  0.3896  0.0000  1
  Cl  Cl2  4  0.0993  0.5993  0.5000  1
]