data_[Sm2S2F2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sm  1.1700  1.8500  1.2290
  S  2.5800  1.0000  0.8800
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [P4/nmm]
_cell_length_a [3.8904]
_cell_length_b [3.8904]
_cell_length_c [6.9448]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [129]
_chemical_formula_structural [SmSF]
_chemical_formula_sum '[Sm2 S2 F2]'
_cell_volume [105.1108]
_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
[
  Sm  Sm0  2  0.0000  0.5000  0.7707  1.0
  S  S1  2  0.0000  0.5000  0.3547  1.0
  F  F2  2  0.0000  0.0000  0.0000  1.0
]