data_[K6Sr6Ca6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Sr  0.9500  2.0000  1.3200
  Ca  1.0000  1.8000  1.1400
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [4.2352]
_cell_length_b [4.2352]
_cell_length_c [62.7181]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [KSrCa]
_chemical_formula_sum '[K6 Sr6 Ca6]'
_cell_volume [974.2445]
_cell_formula_units_Z [6]
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
[
  K  K0  6  0.0000  0.0000  0.1983  1.0
  Sr  Sr1  6  0.0000  0.0000  0.4088  1.0
  Ca  Ca2  6  0.0000  0.0000  0.3092  1.0
]