data_[Rb4Na4Ca4Cl16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Na  0.9300  1.8000  1.1600
  Ca  1.0000  1.8000  1.1400
  Cl  3.1600  1.0000  0.7800
]
_symmetry_space_group_name_H-M [Imma]
_cell_length_a [8.5168]
_cell_length_b [8.7019]
_cell_length_c [12.8445]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [74]
_chemical_formula_structural [RbNaCaCl4]
_chemical_formula_sum '[Rb4 Na4 Ca4 Cl16]'
_cell_volume [951.9357]
_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  0.0000  0.2500  0.3860  1.0
  Na  Na1  4  0.0000  0.0000  0.0000  1.0
  Ca  Ca2  4  0.2500  0.2500  0.7500  1.0
  Cl  Cl3  8  0.0000  0.0405  0.7590  1.0
  Cl  Cl4  8  0.2159  0.7500  0.0371  1.0
]