data_[Sm2Er6Tm8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sm  1.1700  1.8500  1.2290
  Er  1.2400  1.7500  1.0300
  Tm  1.2500  1.7500  1.0950
]
_symmetry_space_group_name_H-M [Pmn2_1]
_cell_length_a [11.1153]
_cell_length_b [7.2018]
_cell_length_c [6.2300]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [31]
_chemical_formula_structural [SmEr3Tm4]
_chemical_formula_sum '[Sm2 Er6 Tm8]'
_cell_volume [498.7129]
_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  0.3733  0.1480  1.0
  Er  Er1  4  0.2497  0.6267  0.9814  1.0
  Er  Er2  2  0.0000  0.6261  0.6467  1.0
  Tm  Tm3  4  0.2484  0.8766  0.4810  1.0
  Tm  Tm4  2  0.0000  0.1238  0.6485  1.0
  Tm  Tm5  2  0.0000  0.8765  0.1473  1.0
]