data_[Ac1Sm2Y1Se4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Sm  1.1700  1.8500  1.2290
  Y  1.2200  1.8000  1.0400
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2/m]
_cell_length_a [7.2645]
_cell_length_b [4.1664]
_cell_length_c [7.4761]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.7028]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [10]
_chemical_formula_structural [AcSm2YSe4]
_chemical_formula_sum '[Ac1 Sm2 Y1 Se4]'
_cell_volume [214.3286]
_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
[
  Ac  Ac0  1  0.5000  0.5000  0.0000  1
  Sm  Sm1  1  0.0000  0.0000  0.0000  1
  Sm  Sm2  1  0.0000  0.5000  0.5000  1
  Y  Y3  1  0.5000  0.0000  0.5000  1
  Se  Se4  2  0.2399  0.0000  0.7334  1
  Se  Se5  2  0.2500  0.5000  0.2625  1
]