data_[Er4Tm4Si8Os4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Er  1.2400  1.7500  1.0300
  Tm  1.2500  1.7500  1.0950
  Si  1.9000  1.1000  0.5400
  Os  2.2000  1.3000  0.6730
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [10.5186]
_cell_length_b [4.2072]
_cell_length_c [9.8767]
_cell_angle_alpha [90.0000]
_cell_angle_beta [118.5289]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [ErTmSi2Os]
_chemical_formula_sum '[Er4 Tm4 Si8 Os4]'
_cell_volume [384.0078]
_cell_formula_units_Z [4]
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
[
  Er  Er0  4  0.1855  0.0000  0.6112  1
  Tm  Tm1  4  0.0073  0.0000  0.1783  1
  Si  Si2  4  0.0055  0.5000  0.3762  1
  Si  Si3  4  0.1413  0.5000  0.0600  1
  Os  Os4  4  0.2309  0.5000  0.8718  1
]