data_[Ca4Sm1Hg5]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  Sm  1.1700  1.8500  1.2290
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [P4/mmm]
_cell_length_a [3.8269]
_cell_length_b [3.8269]
_cell_length_c [18.7952]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [123]
_chemical_formula_structural [Ca4SmHg5]
_chemical_formula_sum '[Ca4 Sm1 Hg5]'
_cell_volume [275.2528]
_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
[
  Ca  Ca0  2  0.0000  0.0000  0.1995  1.0
  Ca  Ca1  2  0.0000  0.0000  0.3994  1.0
  Sm  Sm2  1  0.0000  0.0000  0.0000  1.0
  Hg  Hg3  2  0.5000  0.5000  0.0994  1.0
  Hg  Hg4  2  0.5000  0.5000  0.3006  1.0
  Hg  Hg5  1  0.5000  0.5000  0.5000  1.0
]