data_YbSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.79
_cell_length_b   5.79
_cell_length_c   3.88
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   134.14
_symmetry_Int_Tables_number   1
_chemical_formula_structural   YbSi
_chemical_formula_sum   'Yb2 Si2'
_cell_volume   93.51
_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
  Yb  Yb2  1  0.26  0.15  0.91  1.0
  Yb  Yb3  1  0.26  0.85  0.97  1.0
  Si  Si0  1  0.26  0.74  0.97  1.0
  Si  Si1  1  0.26  0.26  0.91  1.0

data_YbSi
_symmetry_space_group_name_H-M   P-1
_cell_length_a   3.88
_cell_length_b   4.52
_cell_length_c   5.79
_cell_angle_alpha   112.93
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   YbSi
_chemical_formula_sum   'Yb2 Si2'
_cell_volume   93.51
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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
  Yb  Yb0  2  0.47  0.85  0.85  1.0
  Si  Si1  2  0.47  0.74  0.74  1.0

Yb Yb Si Si